BSTL

The acronym for "Balls Stuck To Leg", which reffers to when a male's testicles are stuck to the side of his inner thigh.

Joe: "Hey man, why do you keep grabbing your balls like that?"

John: "BSTL, man"

Joe: "Oh, that bites."

by d00d_M@N_ur_1337 October 13, 2009