Balls stuck to leg: an extremely uncomfortable phenomena occurring when a male wears boxer shorts in a warm environment. Often leads the male to make a an awkward gesture in which he fixes the problem by either hand or an extra long step, twisting motion whilst walking.
Girl: Did that guy just grab his package?
Guy: Dude he was fixing himself, if you had BSTL you'd understand.
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."