Top Definition
fbu
Fuck Bitches Up. Used by one group of girls to threaten another.
"Are you going to that Powderpuff football game tonight?"

"Yeah, the Seniors are gunna fbu!"
by mousefacee November 23, 2009
4 more definitions
FBU
Facebook Unsubscribe/Unlike
Douche Indian/Soccer Boy: Hey!
Cool guy: FBU
by Chicken Nuggets and Fries January 06, 2012
FBU
Chat speak = Fine By Us
Online friend one: I'm gonna run to the store. I'll be back in a few.

Online Friends 2: FBU
by DorianGray April 10, 2008
fbu
hardest cunts aroud next to mortdale
by Anonymous July 25, 2003
fbu
fat cunts walla
by big m July 25, 2003

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