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1.
Chat acronym for Are You Fu**ing Serious?
Bill: I saw your mom down by the pier last night.
Jim: AYFS?
by Flek Ricci January 19, 2007
 
2.
ayf
Ayf = All your Face, as in, All your face are belong to us, the battlecry of the alien facehggers from the alien films. a la all your base
Rob: I'm playing the AVP game
Will: Wow. What as?
Rob: Aliens
Will: Got facehuggers?
Rob: Yes.... why?
Will: So you can say: "AYF"
Rob: ?
Will: As in, "All your face"
Rob: ?
Will: as in, "All your face are belong to us"
Rob: :s
by Tartarus September 22, 2005
 
3.
AYF
A Young Fucker.
John: Look at George! He's AYF.
by Yoh0h0 October 25, 2011