(n.) acronym for "big tits"; only acceptable for use when interchangable with one's name, as if a nickname, i.e. used only in the place of a name, specifically that of a female with large breasts (exs.: inappropriate use - That woman has B.T.; appropriate use - I have a date with B.T.)
When Bainz called me, it soon became apparent he was checking to see how my night with B.T. had gone.
by P'tainz February 12, 2013
Christian ripped a b.t. before heading off to class.
by hughmonger October 31, 2003
"Bald Twat"
As in, underage, barely legal pussy.
"Donny got arrested for fucking around with that B.T."
by Gerry "s" April 11, 2008
when you are sitting either alone or in school or at some other social function, and you see a very attractive young female and you decide to get a hardy(also known as boner time)
yo nigga you see dat bitch walk by?man shoot, i took some B.T. right thurr

shit nigga i got mad B.T. today
by sir daddy long cock April 26, 2008
Also known as BIG TITS . A girl that has big tits , may be referred to as a nickname
A girl with really big boobs who commonly cannot keep her own boobs hidden

Her boobs are known to always POP out !
"Hey B.T "
Translation hey big tits

Hey Kathy is a B T ,
trunciation for bottle tokes.

action...
putting hash on a cigarette, inserting it into a whole made at the side of a bottle and letting it cook, until ready.
yo that last b.t. fucked me right up.
by G.I.JER September 22, 2003