BT 

Abbreviation of bottom, butt(ocks), booty.

Woah, that girl sure got a meaty BT.

BT by Nick Smith December 3, 2003

BT 

Big Tits.

I think you get the idea.

Jim: Have you seen BT anywhere?
Jon: Who da fucks BT?

*sees lady friend with really big tits walk by.*

Jon: oooooh.

BT by blatsuwu December 11, 2011

BT 

Big Tease - Often referred to someone that flirts with a bunch of people and does nothing to follow up with. This in turn can lead to people getting mad and disrespecting the BT.

Taylor G is a BT

BT by Riceay November 15, 2010

bt 

Any person who administers a heavily censored discussion board about Internet topics. The need for censorship arises when there are mildly negative posts about the board's hidden commercial partners.

Some bt nuked my post about the bad practice of a popular search engine.

bt by Justin November 2, 2004

bt 

short/slang term for Bong Toke.

yo man lets get lifted off some fatty BT's before the party.

bt by rhino17 August 21, 2008

BT 

An acronymn for "Bridge & Tunnel" referring to people who come to Manhatten on the weekeds via a bridge or a Tunnel to get to the city and party.

Bungalow 8 is awful on Saturdays because of all the BTs.

BT by Andre Bagel June 19, 2006

bt 

1.A three valved low brass instrument

2.stands for Bass Trumpet

3.An extremely awesome instrument

4.used in marching band instead of euphoniums

1.BT's are awesome

2.Check out thoose BTs.

3.BTs are extremely awesome

4.Check out that marching band they have seven BT's

bt by most_Awesome November 27, 2006