não dar desconto

You use it like a standard verb phrase. Conjugate dar according to the subject. You can use it for prices, obviously. But try using it for behavior. If your boss is being very strict today, he is não dando desconto. If you are playing a video game and beating your little brother easily, you are não dando desconto to him. It’s versatile and punchy.

Use it when someone is being demanding. Use it when you are being competitive. It’s perfect for sports or games. It also works in professional settings. If a contract is non-negotiable, the company não dá desconto. It shows you are serious. It shows there is no room for excuses.

Don't use it in very delicate emotional situations. If someone is grieving, don't say you won't dar desconto. That sounds cold. Avoid it when you want to sound soft or forgiving. It’s a phrase of steel, not silk. If you want to be kind, this isn't your phrase.

Brazil has a huge culture of pechincha (bargaining). Everyone expects a discount. When someone says they não dão desconto, it’s a firm boundary. It’s a pushback against the social norm of negotiation. It reflects a moment of total seriousness. It’s the end of the 'Brazilian way' of fixing things.

You might hear sem desconto. This is the shorter, more aggressive version. Sometimes people say não abro mão, which means 'I won't give in'. But não dar desconto is the most common for social interactions. It’s the classic way to say 'I'm playing for keeps'.