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
November 02, 2009