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1.
bbq
Generally the acronym used for barbecue, it has evolved into a piece of the internet vernacular.

Used to poke fun by attaching it to common acronyms such as wtf, omg and hax.
You cheating whorej! haxomgwtfbbq!
by Blackguard January 29, 2004
 
2.
bbq
an acronym used for barbecue but sometimes used to point out the absurdity of using acronyms online.
i was all like, 'dude, omg wtf stfu bbq'
by noop August 04, 2004
 
3.
bbq
Often used to parody online acronyms, this originally stood for "better be quick," usually used in online games.
"i need to change loadouts"
"bbq, the game is about to start"
by Big Al July 16, 2004
 
4.
bbq
Short for "bitches be queefing". Queefing is the discharge of air from the vaginal tract, known as vaginal flatulence.
Tweet: My girlfriend just made a fart with her lady parts. #bbq
by Brynjar Melis April 12, 2013
 
5.
BBQ
Melbourne Australian slang for sexual encounter
I had 'bbq' last night
That is my 'bbq' over there
by matt_mnm July 23, 2009
 
6.
BBQ
Baby cutie
Awe, look at that BBQ over there! She's adorable!
by Murphyjeff November 21, 2012
 
7.
bbq
Originally started on irc channels and then used in instant messengers meaning "be back quick". More recently used as a leet speak variant meaning "barbecue" in conjunction with phrases and other acronyms mainly meant to tease the lesser experienced.
Internet tech chat room;

Steve: let me get this number for you...
Andy : okay but bbq, I gotta go out soon!

Doom 3 Multiplayer;

RocketJohnny: OMGLMAOBBQPIZZA!!! i r 2 fast 4 u noob!!
Noob: fu, ur a rocket hack, ass
by GCMax November 02, 2009