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Stands for BeaT The Fuck Up.

This phrase is uttered when a party or person does something totally inappropriate or absurd in someones point of view.
In a sprint race, someone tripping an opponent near the finish line.

Calling someone something out of line within a group of people in an argument where all parties comprehend the gravity of the statement towards the affected person.

Rosie O'Donnell, Danny Bonaduce, and Flavor Flav all got a TV show. Which in turn is BTTFU.
by Judogizzard January 30, 2010
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