abbreviation for "i dont give a fuck" mostly used by 11 year old kids who possibly do give a fuck.
Person 1: listen man, yo girl UGLY!
Person 2: dude idgaf she hot
I-D-G-A-F=I dont give a FUCK
Jen= So is my painting beautiful or not?
Dorly= Idgaf so no
wow you looked this up it means I DONT GIVE A FUCK
nobody: your mean
Nobody: idgaf