AF means "As F#ck". For example: "UR cool AF!" meaning "You're cool as F#ck!"
See AF T-Shirts at amazon for lots more ways to use the acronym AF.
What is LAMEO short for?
What does SOMSW stand for?
What does FLAG stand for?
What is the meaning of Shelby in text slang?
What does TIRF stand for?
What does Emos mean in internet jargon?
What is the meaning of WF?
What does the word BRH mean?