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Definitions by Juuustin

B.T.S.B 

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Big Tits, Small Brain.

A girl with big breasts but doesn't have any smarts.
Justin: Yo, did you see that girl pass by? She got B.T.S.B!
Michael: Dude, THATS MY SISTER...
B.T.S.B by Juuustin September 26, 2006
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