Stands for "bad kid" in video game terms. A player who is consistetly awful at everything he does. Can very well apply to real life situations.
Wow, these kids are bk's!

Player 1: How did you snipe me in the face when I was using a shotgun close range?
Player 2: 'Cause you're a bk.

Red Team Post Game: Wow, you guys suck even though you won. You guys cheat. Wanna 1v1!?!?!
Blue Team Post Game: You guys suck. You're worse than noobs. You guys are bk's. Get pwned.
by Edgecrusher v2 May 18, 2009
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BK stands for Beaver County.
aka the greatest place in the world.
aka where my children will be raised.
aka where me and H-Unit n D-Unit put it down.
The real gangstas are from the BK.
by AK slut May 2, 2005
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The literal definition is "Best Kisser." However, it can also mean "Unnecessarily good looking" or "Insanely attractive."
by Harvey Sislac April 21, 2009
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The ultimate, unbelievably horrible buzzkill. Something you do not want to experience after smoking.

See also: BK Broiler, BK Backporch Griller, BK Backporch Broiler, BK Burger Shot
Being arrested last night was a Whopper BK.

Wow, I'll bet. But don't BK me right now with this story man.
by Smollie October 22, 2009
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3,4-methylenedioxy-N-methylcathinone, AKA: methylone, bk MDMA, M1, is an is an entactogen of the phenethylamine, amphetamine, and cathinone classes. It was originally patented by Peyton Jacob and Alexander Shulgin in 1996 as an antidepressant . It resembles MDMA in its effects on the body and mind. Alexander Shulgin wrote "Methylone has almost the same potency as MDMA, but does not produce the same effects. It has an almost antidepressant action, pleasant and positive, but not the unique magic of MDMA".
bk MDMA MDMA methylone m1
by makeshift-piano August 9, 2011
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A worthless piece of trash scrub taht thinks they are good because their gb rank finally got ranked. These people usually try really hard and say "Im Done" and rage daily. They always masturbate.
Those Bk Randbobs MeRcuRiiE, erick503, and HOUSTONPSHYCO all drop donuts against scrubs.
by Bk Randy ezTabLizH April 14, 2011
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One who is so hopelessly untalented at a video game that to make their meek lives worth bearing at all, they crawl to their masters knees and let their jaws gape open for a teabag.
After Dwayne failed to kill me on halo, having had an overshield and rockets, i made him crawl over to me and let me give him a sacking. Its what the BK Crawler deserved!
by FanOfTheKKK April 18, 2010
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