Idiom Neutral 6 Min. Lesezeit

cold blooded

Cruel, merciless, and unemotional, often in a planned way.

Wörtlich: Having blood that is cold in temperature.

In 15 Sekunden

  • Cruel and unemotional behavior
  • Calculated or heartless actions
  • Calmness under extreme pressure (sports)
  • Biological term for reptiles/fish

Bedeutung

Grausam und ohne Emotionen oder Mitleid. Es beschreibt eine Person, die etwas Schlechtes auf eine sehr ruhige, geplante Weise tut, ohne sich schuldig zu fühlen.

Wichtige Beispiele

3 von 10
1

Watching a thriller movie

The villain gave a cold-blooded smile before locking the hero in the room.

The villain gave a heartless smile before locking the hero in the room.

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2

Sports commentary on Twitter

That last-second three-pointer was cold-blooded! He has ice in his veins.

That last-second three-pointer was amazingly calm! He has ice in his veins.

<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14.828 14.828a4 4 0 01-5.656 0M9 10h.01M15 10h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>
3

Business meeting reflection

Firing him on his birthday was a cold-blooded move by the management.

Firing him on his birthday was a heartless move by the management.

<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 13.255A23.931 23.931 0 0112 15c-3.183 0-6.22-.62-9-1.745M16 6V4a2 2 0 00-2-2h-4a2 2 0 00-2 2v2m4 6h.01M5 20h14a2 2 0 002-2V8a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z"/></svg>
🌍

Kultureller Hintergrund

The phrase originates from the ancient medical theory of the 'four humors,' where body fluids like blood were thought to dictate personality. 'Warm' blood was associated with vitality and passion, while 'cold' blood was linked to a lack of spirit or emotion. Culturally, it reflects a long-standing human tendency to associate heat with life and love, and coldness with death and cruelty. In modern Western culture, it has been cemented by the true crime genre and 'noir' films, where it describes the 'calculated' nature of a criminal mind.

💡

The 'Sports' Exception

In sports, being 'cold-blooded' is a huge compliment! It means you are so calm that the pressure doesn't bother you. LeBron James or Steph Curry are often called 'cold-blooded'.

⚠️

Don't get physical

Never say 'I am cold-blooded' if you just need a blanket. People will think you are admitting to being a sociopath or a lizard. Just say 'I'm cold'.

In 15 Sekunden

  • Cruel and unemotional behavior
  • Calculated or heartless actions
  • Calmness under extreme pressure (sports)
  • Biological term for reptiles/fish

What It Means

Have you ever seen a movie villain who does something terrible while eating an apple or whistling a tune? That is exactly what cold-blooded feels like. In English, we use this to describe someone who lacks basic human empathy. It is not just about being mean; it is about being mean without any emotion. If someone gets angry and shouts, they are 'hot-headed.' But if they calmly plan a way to hurt someone's feelings or career, they are cold-blooded. It is the difference between a fire and an ice cube. One burns you quickly, the other freezes you slowly. Using this phrase usually implies that the person is slightly less than human because they lack the 'warmth' of kindness. It’s a heavy term, so don’t use it just because someone forgot to say 'thank you' for their coffee!

Origin Story

This idiom actually starts with biology and ancient science. Long ago, people believed that blood was the source of our temperament. If you had 'warm' blood, you were passionate and kind. If your blood was 'cold,' you were unfeeling. We also look at animals like snakes and lizards. These creatures are literally 'cold-blooded' (ectothermic), meaning their body temperature changes with the environment. Because reptiles often look still, stoic, and sometimes scary to humans, we started comparing unemotional people to them. Shakespeare and other writers helped popularize the idea that a person without 'warm' feelings must have literal cold liquid in their veins. So, when you call your boss cold-blooded, you’re basically calling them a very organized lizard. Just don't say it to their face unless you want to find a new job on LinkedIn!

How To Use It

You mostly use cold-blooded as an adjective before a noun or after a linking verb like 'is' or 'was'. For example, 'That was a cold-blooded thing to do' or 'He is a cold-blooded killer.' In modern slang, especially in sports or gaming, people sometimes use it as a compliment! If a basketball player hits a winning shot while under huge pressure, a commentator might scream, 'He’s cold-blooded!' This means they are so calm they don't feel the stress. However, in 90% of daily life, it’s a negative way to describe a heartless person. It’s like the 'dark mode' of personality traits.

Real-Life Examples

You’ll hear this a lot on Netflix crime documentaries or in police procedural shows. A detective might say, 'This was a cold-blooded crime,' meaning it was planned and heartless. On social media, you might see it in a TikTok comment about a celebrity breakup: 'Wow, she dumped him via text? That’s cold-blooded.' In a job interview on Zoom, you might describe a difficult situation where a competitor was cold-blooded in their business tactics. Even in gaming, if you eliminate an entire team without breaking a sweat, your friends might call you cold-blooded in the group chat. It’s all about that 'ice in the veins' energy.

When To Use It

Use this when you are talking about something truly heartless. It works well when describing a betrayal that was planned out. If a friend lies to you just to get ahead, that’s a cold-blooded move. It’s also great for discussing history or literature. If you're talking about a king who executed his rivals, cold-blooded is the perfect word. It adds a lot of drama to your English. It’s like adding a spicy (or in this case, very cold) sauce to your vocabulary. Use it when 'mean' or 'unkind' just isn't strong enough to describe the lack of soul in an action.

When NOT To Use It

Don't use this for accidents! If someone accidentally steps on your toe, they aren't cold-blooded; they are just clumsy. Also, don't use it for people who are just shy or quiet. Being 'cold' (unfriendly) is different from being cold-blooded (cruel). If your Uber driver doesn't talk to you, they aren't cold-blooded. They probably just want to listen to their podcast in peace. Save this heavy-hitter for the big stuff, like villains or ruthless business tycoons. If you use it too much, people might think you’re a bit of a drama queen (or king)!

Common Mistakes

He is a cold-blood person He is a cold-blooded person
The crime was cold blood The crime was committed in cold blood (Note: 'In cold blood' is the adverbial version!)
I feel cold-blooded today I feel cold today (Unless you are actually turning into a snake, don't say you are cold-blooded to mean you need a jacket!)
He acted very cold-bloody He acted in a cold-blooded way

Similar Expressions

If cold-blooded feels too intense, you can use 'heartless' or 'ruthless.' If someone has no feelings, you can say they have a 'heart of stone.' In a more modern way, you might say someone is 'savage' (though that can sometimes be a good thing). 'Stone-cold' is another great alternative, often used like 'stone-cold killer.' If you want to be more formal, try 'callous.' There are many ways to describe being mean, but cold-blooded is the one that really makes people shiver. It’s the Elsa of insults, but without the catchy songs.

Memory Trick

💡

Think of a snake or a crocodile. They don't have fur, they don't cuddle, and they just stare with those unblinking eyes. Imagine a person with the eyes of a snake. That is a cold-blooded person. You can also remember 'Ice in the veins.' If someone has ice instead of blood, they won't feel the 'warmth' of love or pity. Just don't try to check if your friends actually have ice in their veins; it makes for a very awkward dinner party.

Quick FAQ

Is cold-blooded always bad? Usually, yes. It means cruel. However, in sports, it can mean being very calm under pressure. So, context is key!

Can I use it for animals? Yes! Biologically, fish and reptiles are cold-blooded. Just make sure people know you’re talking about science and not their personality!

Is it formal or informal? It’s neutral. You can use it in a newspaper or in a chat with a friend. It's a very versatile way to call someone a jerk.

What is the opposite? The opposite would be 'warm-hearted' or 'compassionate.' It's much better to be known for your warm heart than your cold blood!

Nutzungshinweise

The phrase 'cold-blooded' is a powerful adjective. Ensure you always include the '-ed' suffix when using it to describe a person or action. Be aware that while it usually means 'cruel,' its use in sports as a compliment for being 'clutch' is becoming increasingly popular among younger speakers.

💡

The 'Sports' Exception

In sports, being 'cold-blooded' is a huge compliment! It means you are so calm that the pressure doesn't bother you. LeBron James or Steph Curry are often called 'cold-blooded'.

⚠️

Don't get physical

Never say 'I am cold-blooded' if you just need a blanket. People will think you are admitting to being a sociopath or a lizard. Just say 'I'm cold'.

🎯

Adverbial usage

If you want to describe *how* something was done, use the phrase 'in cold blood.' For example: 'He was fired in cold blood.'

💬

The Reptile Connection

English speakers subconsciously link cold-blooded behavior to snakes. Using words like 'hiss' or 'slither' alongside this phrase adds extra descriptive power!

Beispiele

10
#1 Watching a thriller movie
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4.318 6.318a4.5 4.5 0 000 6.364L12 20.364l7.682-7.682a4.5 4.5 0 00-6.364-6.364L12 7.636l-1.318-1.318a4.5 4.5 0 00-6.364 0z"/></svg>

The villain gave a cold-blooded smile before locking the hero in the room.

The villain gave a heartless smile before locking the hero in the room.

Shows the person has no pity.

#2 Sports commentary on Twitter
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14.828 14.828a4 4 0 01-5.656 0M9 10h.01M15 10h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>

That last-second three-pointer was cold-blooded! He has ice in his veins.

That last-second three-pointer was amazingly calm! He has ice in his veins.

A rare positive usage meaning 'clutch' or 'calm'.

#3 Business meeting reflection
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Firing him on his birthday was a cold-blooded move by the management.

Firing him on his birthday was a heartless move by the management.

Describes a ruthless professional action.

#4 Texting about a breakup
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She broke up with him over a TikTok comment? That's cold-blooded.

She broke up with him over a TikTok comment? That's heartless.

Casual social media context.

#5 Documentary about sharks
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 13.255A23.931 23.931 0 0112 15c-3.183 0-6.22-.62-9-1.745M16 6V4a2 2 0 00-2-2h-4a2 2 0 00-2 2v2m4 6h.01M5 20h14a2 2 0 002-2V8a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z"/></svg>

Sharks are cold-blooded animals that have adapted perfectly to the ocean.

Sharks are animals with cold blood that have adapted perfectly to the ocean.

Uses the literal, biological meaning.

A learner making a mistake Häufiger Fehler
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✗ I am cold-blooded because I forgot my jacket. → ✓ I am cold because I forgot my jacket.

I am cold because I forgot my jacket.

You shouldn't use 'cold-blooded' to describe your physical temperature.

#7 Discussing a news story
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The judge described the robbery as a cold-blooded attack on an innocent person.

The judge described the robbery as a heartless attack on an innocent person.

Legal/formal context describing a crime.

#8 Group chat joke
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You ate the last slice of pizza while I was in the bathroom? Cold-blooded, man.

You ate the last slice of pizza while I was in the bathroom? Heartless, man.

Using the term lightheartedly for a minor 'betrayal'.

Common grammar error Häufiger Fehler
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 13.255A23.931 23.931 0 0112 15c-3.183 0-6.22-.62-9-1.745M16 6V4a2 2 0 00-2-2h-4a2 2 0 00-2 2v2m4 6h.01M5 20h14a2 2 0 002-2V8a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z"/></svg>

✗ He is very cold-blood. → ✓ He is very cold-blooded.

He is very heartless.

Always remember the '-ed' ending for the adjective.

#10 Describing a historical figure
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The dictator was known for his cold-blooded treatment of any opposition.

The dictator was known for his ruthless treatment of any opposition.

Historical/descriptive context.

Teste dich selbst

Fill in the blank

✓ Richtig! ✗ Nicht ganz. Richtige Antwort: cold-blooded

In biology, animals like lizards are literally cold-blooded.

Find and fix the error

✓ Richtig! ✗ Nicht ganz. Richtige Antwort:

The adjective form requires the '-ed' suffix: 'cold-blooded'.

Choose the correct option

In which scenario is 'cold-blooded' used positively?

✓ Richtig! ✗ Nicht ganz. Richtige Antwort: A player hitting a game-winning shot under pressure.

In sports slang, 'cold-blooded' can mean being calm and successful under pressure.

🎉 Ergebnis: /3

Visuelle Lernhilfen

Formality & Context Spectrum

Casual

Used for minor betrayals among friends (eating the last pizza).

"That's cold-blooded, man!"

Neutral

Used in news or general descriptions of heartless people.

"A cold-blooded criminal."

Sports Slang

A positive way to describe being calm under pressure.

"A cold-blooded winner!"

Biological

Strictly scientific description of reptiles.

"Cold-blooded organisms."

Where to use Cold-Blooded

Cold-Blooded
🕵️

True Crime

Describing a heartless heist.

🏀

Basketball

Hitting a winning shot.

💔

Breakups

Ending it via ghosting.

🐸

Science Class

Learning about frogs.

💼

Business

Ruthless company takeovers.

Cold-Blooded vs. Similar Terms

Cold-Blooded
Vibe Calculated & Eerie
Focus Lack of feeling
Heartless
Vibe Mean & Unkind
Focus Lack of love
Ruthless
Vibe Aggressive & Unstoppable
Focus Success at any cost

Types of Cold-Blooded Scenarios

😈

Villainous

  • Planned betrayal
  • Heartless lies
  • Evil schemes
📈

Professional

  • Mass layoffs
  • Ruthless firing
  • Aggressive deals
🐍

Biological

  • Reptiles
  • Amphibians
  • Most fish

Aufgabensammlung

3 Aufgaben
Fill in the blank Fill Blank beginner

Lizards are ___ animals, but dogs are warm-blooded.

✓ Richtig! ✗ Nicht ganz. Richtige Antwort: cold-blooded

In biology, animals like lizards are literally cold-blooded.

Find and fix the error Error Fix intermediate

Finde und korrigiere den Fehler:

The thief was a cold-blood man who didn't care about his victims.

✓ Richtig! ✗ Nicht ganz. Richtige Antwort: The thief was a cold-blooded man who didn't care about his victims.

The adjective form requires the '-ed' suffix: 'cold-blooded'.

Choose the correct option Choose advanced

In which scenario is 'cold-blooded' used positively?

✓ Richtig! ✗ Nicht ganz. Richtige Antwort: A player hitting a game-winning shot under pressure.

In sports slang, 'cold-blooded' can mean being calm and successful under pressure.

🎉 Ergebnis: /3

Häufig gestellte Fragen

18 Fragen

Not exactly! 'Mean' is a general word for being unkind. 'Cold-blooded' is more specific—it implies that the person is calm, calculated, and completely lacks human emotion while being mean. It is much stronger and more dramatic than just saying someone is mean.

You wouldn't usually call a movie 'cold-blooded,' but you would definitely call the villain or a specific scene 'cold-blooded.' For example, 'That scene where the spy betrays his partner was totally cold-blooded.' It focuses on the character's heartless behavior.

In basketball, if a player makes a difficult shot at the end of a game, they are called 'cold-blooded' because they didn't let the stress affect them. Their 'blood' didn't boil with anxiety; they stayed cool and calm. It is one of the few times the phrase is a positive thing.

Yes, it is extremely insulting in most situations! It suggests the person is heartless and lacks basic humanity. You should only use it if you are very angry with someone or if you are talking about a fictional character or a famous criminal.

They are very similar, but 'cold-hearted' sounds a bit more emotional and sad, while 'cold-blooded' sounds more dangerous and calculated. You might have a cold-hearted ex-girlfriend, but a cold-blooded assassin. One is about feelings, the other is about actions.

Probably not! It is a very strong and judgmental phrase. If you use it in a professional email, you might come across as unprofessional or overly dramatic. Instead, try using words like 'unprofessional,' 'callous,' or 'insensitive' if you need to complain.

Biologically, 'cold-blooded' just refers to how an animal regulates its body heat. Many reptiles, like bearded dragons, can be very friendly pets! So, a 'cold-blooded' animal isn't necessarily a 'cold-blooded' (mean) creature in terms of personality.

It is pronounced /koʊld ˈblʌdɪd/. Make sure to emphasize the 'blood' part and clearly pronounce the '-ed' at the end as an extra syllable. It should rhyme with 'studded' or 'flooded.' Practice saying it slowly to get the rhythm right.

It comes from the old idea that blood temperature was linked to emotions. People with 'warm blood' were thought to be passionate, while those with 'cold blood' were thought to be unfeeling. It also references reptiles, which don't have fur and often appear stoic or scary.

Yes! In modern slang, people might just say someone is 'cold' or 'savage' to mean the same thing. For example, if someone makes a really sharp joke at a friend's expense, the group might shout, 'That's cold!' It's a shorter, punchier way to say it.

It would be very unusual and quite harsh to call a child 'cold-blooded.' Children are usually seen as acting on impulse or not knowing better. This phrase implies a level of adult calculation and intentional cruelty that most children don't have yet.

The most common mistake is forgetting the '-ed' at the end and saying 'cold-blood.' Another big mistake is using it to say you feel physically cold because you need a jacket. Remember, 'cold-blooded' is about your soul, not your skin temperature!

No! While it's often used for 'cold-blooded killers,' it can be about any heartless act. Firing someone without a good reason, lying to a friend, or stealing something from a charity could all be described as 'cold-blooded' because they show a lack of empathy.

It is quite neutral. You will see it in serious news reports about crime, but you will also hear it in casual conversations between friends. It is a 'standard' idiom that almost every native English speaker knows and uses in various contexts.

Not really! Both British and American speakers use 'cold-blooded' in the same way. The sports slang (using it as a compliment) is more common in American English, especially in basketball culture, but the negative meaning is universal across the English-speaking world.

No, you cannot call the weather 'cold-blooded.' Weather can be 'bitterly cold' or 'freezing,' but it doesn't have 'blood' or 'intent.' Only living things (or personified things like a heartless company) can be described as 'cold-blooded.' Keep it for the humans and the lizards!

The best antonyms are 'warm-hearted,' 'compassionate,' or 'empathetic.' These words describe someone who cares about others and acts with kindness. If someone is 'warm-hearted,' they are the total opposite of the 'cold-blooded' person who doesn't care who they hurt.

It is usually written with a hyphen: 'cold-blooded.' Sometimes in very casual texting, people might omit the hyphen, but in any kind of writing (even an Instagram caption), using the hyphen is the correct and most common way to spell it.

Verwandte Redewendungen

🔄

Heart of stone

synonym

A person who is very unfeeling and cannot be moved by pity.

This is a more poetic way of saying someone is cold-blooded and unfeeling.

🔄

Stone-cold

synonym

Completely lacking emotion or very certain.

It uses the 'cold' metaphor to emphasize a total lack of human warmth.

↔️

Warm-hearted

antonym

Kind, friendly, and compassionate.

It represents the emotional opposite of being cold and cruel.

🔗

In cold blood

related topic

Doing something without emotion, usually a crime.

This is the adverbial form used to describe the manner in which an action was performed.

👔

Callous

formal version

Showing or having an insensitive and cruel disregard for others.

This is a more sophisticated, academic term for someone who is cold-blooded.

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