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Butt Urine. When you have diarehha so bad it's just liquid.
Guy 1 - "Oh man I had suicide wings at the Broken Thumb last night, and I have the worst case of BU."
Guy 2 - "I am not going to feel bad for you, those wings are worth it."
Guy 1 "God fuck it all!"
BU by Gern Blanstein January 26, 2007
used between lovers
lets get low bu
bu by fuck me February 23, 2004
A non-gender specific term of affection, usually said by someone of brown skin... applied to a significant other i.e. girlfriend or boyfriend.
yoo.. i need you bu... i gotta see you bu...
Bu by blah123456789 May 29, 2008
Either I don't know or I don't want to answer your fucking question.
bu by Screech January 31, 2004
Another way of typing "boo"
Boo/Bu - they mean the same thing!
bu by Sabian June 3, 2004
A typographical error or sacrifice when typing the name Bü without umlauts, or when the "ü" character cannot be displayed in the desired situation.
Dear Bu, I do not have a keyboard with umlauts - sorry.
Bu by Sam January 2, 2004
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