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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
 
1.
BSTL is the acronym for Balls Stuck to Leg. This name speaks for itself.
Ah dude, I've got BSTL bad!
by TrippSwitch October 29, 2010
 
2.
Acronym for Balls sticking to legs.

"Sorry, but in this weather I've got crazy B.S.T.L going on!"
by Délhan June 19, 2006
 
3.
Balls Stuck To Leg

When your balls stick to your leg because they are sweaty
Do u have a spatula? i got B.S.T.L.
by D Rock Da Jew / Derek March 10, 2007
 
4.
Balls Stuck To Leg

When your balls stick to your leg because they are sweaty
Do u have a spatula? i got B.S.T.L.
by Derek Wertheim March 10, 2007
 
5.
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."
by bcpk August 14, 2009
 
6.
Acronym for "Bam, said the lady".

Means: There you go. Done. And... scene. Look at that! Holy Smoke! Slam dunk. I'm finished. C'est tout.
That movie was the best thing ever. BSTL.
by notnathanf August 14, 2009
 
7.
BAM SAID THE LADY!!!
What did the lady say? BSTL!!
by guytobanpeople August 14, 2009