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3 definitions by Slowpoke330

An acronym for "I Am So F-ing Sorry", a sarcastic apology, typically issued in a chat room, forum, or text message communication.
AirEck: Hey guys, check out this funny YouTube video (link).
Deepek: Repost, loser!
AirEck: IASFS, Deepek

by Slowpoke330 January 27, 2008
Abbreviation for: Fucking With U (you)
Variation of FWY
Dude, he parked in your spot. I think he's FWU. (fucking with you)
by slowpoke330 August 26, 2008
Abbreviation for Fuck, or Fucking, With Me

See also: FWY or FWU
You can't come over because your car's out of gas?
Are you FWM? (fucking with me)
by Slowpoke330 August 26, 2008