A1 Idiom Informal

کف دست بو کردن

kaf dast bu kardan

To not know something

Significado

To have no knowledge or idea about something, to be completely clueless.

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Contexto cultural

The idiom reflects the value of 'Hazzer-javabi' (being quick-witted). Iranians love using idioms to turn a defensive moment into a lighthearted one. In Tehran, the phrase is often shortened in speech to 'مگه کف دستمو بو کرده بودم؟' (Mage kaf-e dastamo boo karde boodam?). The 'ra' is dropped and replaced with 'o'. While this specific idiom is more colloquial, the concept of 'Ghayb' (the unseen) is a pillar of Sufi poetry. It shows the transition from high mysticism to everyday slang. The idiom is also understood in Dari and Tajik, though they may have local variations like 'از غیب خبر داشتن'.

🎯

The 'Magar' Magic

Always pair this with 'Magar' (مگر) to sound 100% natural. Without it, the sentence feels incomplete.

⚠️

Don't use with Bosses

It can sound a bit 'sassy.' Use it with peers, but be careful with strict superiors.

Significado

To have no knowledge or idea about something, to be completely clueless.

🎯

The 'Magar' Magic

Always pair this with 'Magar' (مگر) to sound 100% natural. Without it, the sentence feels incomplete.

⚠️

Don't use with Bosses

It can sound a bit 'sassy.' Use it with peers, but be careful with strict superiors.

💬

Body Language

When saying this, Iranians often show their open palms to the listener to emphasize they have nothing hidden.

Teste-se

Choose the most natural response to: 'چرا دیروز به من زنگ نزدی که تولد مریم است؟' (Why didn't you call me yesterday to say it's Maryam's birthday?)

Response:

✓ Correto! ✗ Quase. Resposta certa: ب

Option 'ب' correctly uses the rhetorical question form to express that you had no way of knowing the birthday.

Fill in the missing words to complete the idiom.

ببخشید، من که ______ ______ را ______ نکرده بودم که جلسه کنسل شده.

✓ Correto! ✗ Quase. Resposta certa: کف دستم - بو

The full idiom is 'کف دست را بو کردن'.

In which situation is this idiom MOST appropriate?

Situation:

✓ Correto! ✗ Quase. Resposta certa: B

The idiom is used for unexpected events where you lack 'psychic' knowledge, like a surprise quiz.

Complete the dialogue between two friends.

علی: چرا نان نخریدی؟ نانوایی بسته بود؟ رضا: آره، ______ ______ ______ ______ ______ ______؟

✓ Correto! ✗ Quase. Resposta certa: مگر کف دستم را بو کرده بودم؟

Reza is defending himself for not knowing the bakery would be closed.

🎉 Pontuação: /4

Recursos visuais

Formal vs. Informal 'I didn't know'

Informal (Idiom)
مگر کف دستمو بو کرده بودم؟ How was I to know?
Formal
بنده اطلاع نداشتم. I was not informed.

Banco de exercicios

4 exercicios
Choose the most natural response to: 'چرا دیروز به من زنگ نزدی که تولد مریم است؟' (Why didn't you call me yesterday to say it's Maryam's birthday?) Choose A1

Response:

✓ Correto! ✗ Quase. Resposta certa: ب

Option 'ب' correctly uses the rhetorical question form to express that you had no way of knowing the birthday.

Fill in the missing words to complete the idiom. Fill Blank A1

ببخشید، من که ______ ______ را ______ نکرده بودم که جلسه کنسل شده.

✓ Correto! ✗ Quase. Resposta certa: کف دستم - بو

The full idiom is 'کف دست را بو کردن'.

In which situation is this idiom MOST appropriate? situation_matching A2

Situation:

✓ Correto! ✗ Quase. Resposta certa: B

The idiom is used for unexpected events where you lack 'psychic' knowledge, like a surprise quiz.

Complete the dialogue between two friends. dialogue_completion B1

علی: چرا نان نخریدی؟ نانوایی بسته بود؟ رضا: آره، ______ ______ ______ ______ ______ ______؟

✓ Correto! ✗ Quase. Resposta certa: مگر کف دستم را بو کرده بودم؟

Reza is defending himself for not knowing the bakery would be closed.

🎉 Pontuação: /4

Perguntas frequentes

10 perguntas

Not inherently, but it is informal. It's like saying 'How should I know?' in English—it depends on your tone.

Yes! If you win the lottery, you can say 'I didn't smell my palm that I'd win!'

Past Perfect (Karde boodam) because you are talking about the knowledge you *didn't* have before the event.

Absolutely. It's a timeless classic in Iranian conversation.

Sometimes people just say 'مگه کف دستمو بو کردم؟' (Mage kaf-e dastamo boo kardam?) in simple past.

Only in informal writing, like a story dialogue or a friendly email. Avoid it in formal essays.

Literally, yes. Figuratively, it means being a psychic.

Yes, Dari speakers understand and use it similarly.

People will think you are joking or that you have something sticky on your hand!

Yes, 'Ilm-e Ghayb' is the more religious/formal equivalent.

Frases relacionadas

🔄

علم غیب داشتن

synonym

To have knowledge of the unseen.

🔗

پیش‌گویی کردن

similar

To predict the future.

🔗

از پشت پرده خبر داشتن

similar

To know what's happening behind the scenes.

🔗

شستِ کسی خبردار شدن

contrast

To get a 'whiff' of something / to suspect.

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