What a lot of teenagers say when they're annoyed or mad with someone, especially when someone corrects their spelling, or as they incorrectly like to refer to it as: grammar.

I don't give a fuck, or "no fuck were given" meant you didn't care, but it has turned into a forced insult. Althought teenager may say "You can correct my grammar all you want, because obviously I don't give a fuck" they obviously care about having something they wrote corrected.

"I don't care."

A rude way to say "I couldn't care less".

Lack of giving fucks for a given, usually unpleasant scenario, but he who utters "I don't give a fuck" isn't phased by said scenario. However, in most cases , those who utter, especially yell "I DON'T GIVE A FUCK" usually do.