Definitions by Juuustin

B.T.S.B 

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