Definitions by Samiam.

TTBFTT 

Tits Too Big For Tank Tops.

When a women cannot where a low cut shirt without looking like a slut because her breasts are simply too large.

Boy: Omigod look at that chick! I love when girls where low cut shirts! Id tap that!

Girl: You're disgusting, that poor women just has TTBFTT and its's too hot out for sweaters.

TTBFTT by Samiam. April 24, 2011