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15.
An acronym for Bam Said The Lady. A phrase made popular by Canadian actor Nathan Fillion (of such cult hits as Firefly, Serenity, and currently Castle), used as an expression of enthusiasm and/or finality.
A reminder to Negative Nancys out there- keep it positive. It's insecure to think you have to be mean to be funny. Mean = blocked. BSTL.

After hearing all your secerts, I feel we're all a little closer. Mine? The Incredibles was the best movie ever made. Ever. Made. BSTL.
by nonprofitess August 14, 2009
 
16.
Bull Shit Tolerance Level - The level at which you cannot take any more bull shit.
I wanted to keep letting the guy sleep on my couch but my BSTL was maxed out.
by Red-headedRocker April 18, 2010
 
17.
Acronym for balls stuck to leg
Steve was stretching his legs apart to try and get rid of his BSTL
by awesomepossum123456 March 30, 2010
 
18.
It means Balls Stuck To Leg
Bob: Jerry, what the fuck are you doing?
Jerry: Dude, i have BSTL!
Bod:Aw that sucks.
by AngleWoW September 23, 2009
 
19.
Stands for ball stuck to leg, or balls stuck to leg. This condition commonly occurs in humid climates when wearing loose-fitting underwear, such as boxer shorts.

When the air is very humid and the scrotum's sweat glands are active, muculent fluids will sometimes cause the scrotum to collate itself to the leg or inner thigh.
Man, I really need to get out of this class and have a shower. I have some serious BSTL going on down here.
by Sackripper September 28, 2009
 
20.
BSTL is sometimes used as an acronym for "Bag stuck to leg". A BSTL is a very uncomfortable moment experienced by males when their ball sack gets stuck to their inner thigh.
Jonny began to walk funny as he was going down the street while he was trying to sort out a BSTL.
by Ronnie1134 June 24, 2010
 
21.
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.
by jigga_mane December 22, 2009