The portion of the female body where the thigh meets
the ass. The roundness of the ass creates
a crease, similar to cleavage. The rounder the ass, the more
pronounced the theavage.
"I was stretching with Alyssa before our soccer
game. When she leaned back, I could
see right up her athletic shorts to her theavage."
"I was waiting on the stair
stepper at the gym and some girl's shorts were so short that
see her theavage."