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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
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Only the greatest football football program out there featuring one of the best line backers in football Donavan Hayes
by Football is great April 24, 2017
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