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18.
BL
A philly blunt, after it has been filled with the proper material.
you wanna hit this BL?
by Bobo December 30, 2003
 
1.
BL
In Japan, BL is the "modern" term for Shounenai, deffinition meaning "Boys love."
No matter how you spell it, english or kanji, you will get NOTHING on shounenai on a Japanese search engine, save dead sites refurring to retro mangas from the 70s & 80s.
by Allaiyah January 14, 2004
 
2.
Beautiful Lineswoman

From Seinfeld, "The Lip Reader"

Jerry: She is stunning.
George: Who, the tennis player?
Jerry: No. The lineswoman.
George: Yeah, she is one B.L.
Jerry: What's a B.L.?
George: A beautiful lineswoman.
by lighthouse_keeper April 13, 2009
 
3.
BL
Brother n Law ...
"What up BL... ?"
by Kila_T June 02, 2014
 
4.
BL
abbreviation of beltlooping, the act of concealing an erection behind your belt or waistband
You should BL in case you get asked to stand in front of the class
by tory botra May 11, 2013
 
5.
BL
Barely Legal. A person who has just recently became of age.
She's good to go. She just went from JB to BL.
by Lauren Gio December 28, 2005
 
6.
BL
Abbreviation for Beautiful Lineswoman - a lineswoman at a tennis match that is attractive.

*Taken from the Seinfeld episode "The Lip Reader"*
Jerry: I can't get over how beautiful that lineswoman is.
George: She's a BL.
Jerry: A BL?
George: Yeah, a BL, a beautiful lineswoman.
by rjgoldsborough June 06, 2010
 
7.
BL
ball lightning, the most deadly force in all three dimensions
how the fuck did you make that hypercube? BL bro
by taz gam March 20, 2004