a shortened form of the word 'Borderline' which is used to indicate a joke or statement being sick and/or wrong, ie on the borderline of going too far in terms of general decency.
'i bet that bloke likes to rape young children in his spare time!'
'oh no! thats BL!'
by Simon Stafford May 28, 2005
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
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 borty May 11, 2013
Short for Body Language. Commonly used by PUA's.
Dude, you need to control your BL when approaching.
by TalkingWaterfall October 10, 2014
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
Brother n Law ...
"What up BL... ?"
by Kila_T June 02, 2014
bl a recntly begining msn abreiviation to give some varity rather than the very much over used lol

basicly bl= belly laugh

bl not lol!!
person1: blah blah blah this sentence is in no way funny at all!!

person2:lol

person1:that wasent funny

person2:oh well lol

person 1 : (sumthing reeli funny)

person2: BL!!
by tpspman July 17, 2008
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

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