Balls Stuck To Leg. Usually occurs when a man gets sweaty after working out or after making love in the back room, the man puts on his jeans and the testicles become stuck to either leg, usually very annoying when sitting. May irritate skin when pubes become caught in between
Mack: Damn it, my balls are stuck to my leg again. FUCK! Rob: yeah you call it BSTL, I get it after having hit sex With Tyler's mom.
Bam said the lady. First said in TV series "Castle" by Richard Castle (Nathan Fillion), and further popularized by Nathan Fillion on his twitter feed @NathanFillion. Used as verbal punctuation to express satisfaction or finality.
"The Incredibles was the best movie ever made. Ever. Made. BSTL."