1 definition by d00d_M@N_ur_1337

Top Definition
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

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