Dgaf stands for don't give a fuck!
Kim: You just stomped on my foot as you walked past.
Sentence: Man I was DGAF about that girl last night.
Translation into proper english: I didn't give a fuck about that girl last night
DGAF is a lifestyle. DGAF doesn't mean that you don't care about anything but getting fucked up... it simply means that you don't give a fuck what people think of you. You do what you want because of you.
Just because you DGAF doesn't mean you are an ignorant person who only cares about doing stupid things. To DGAF means you do what YOU want to do, regardless of other people's asshole opinions.
Originated by South Bay OGs Chucky Styles and Gillies
Bob: Yeah, people like them make manditory sterilization sound like a good idea.
Chucky DGAF Styles - Mind Yo Biz.