1 definition by kiki swag
The region between your thigh and your ass that pops out to the side when you walk. Usually occurs with girls who have big thighs and a big ass.
man 1: look at that girls big ass!
man 2: yeah but look at the nasty thass that comes along with it.
man 2: yeah but look at the nasty thass that comes along with it.
by kiki swag April 19, 2009