1 definition by fist_of_justice
stands for Bikini Training Time. The period before the summer when women try to diet and slim down so they look good in their bikinis.
Allison had put on a lot of weight during the winter, so she had to do some BTT.
I can't eat those chocolates. It's BTT!
I can't eat those chocolates. It's BTT!
by fist_of_justice April 15, 2009