idgaf - i don't give a f*ck
used once again by the lazy tossers who can't be bothered to type let alone think of a decent response to any form of comment directed at them.
I Don't Give a Fuck.
When somebody says this, they usually DO give a fuck. They're just trying to tell themselves that they don't, or to affirm their own confidence in themselves against whatever situation or person happens to be their opponent.
Also, a kind of insensitive way to responding to a situation when silence may be a more effective way to convey your meaning.