BK
A noob or novice that has no skill in the said game. (Bad-kid)
That kid doesent even know how to play! what a BK!
by Scott P, Jake L February 20, 2009

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BK
bk stands for a buzkill or someone or something that kills the fun. BK's are usually found making awkward interjections in a conversation that makes everyone in it want to leave.
kevin-"dude last nights party was so funny"

BK Yona-" oh yeah totally man, thanks for inviting me, god i have no friends"

kevin-".... what a BK!!!!!"
by Da bitch takumi November 08, 2011

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bk
an abbreviation for the newfie, or newfoundland, phrase Best Kind, used to describe how something or someone is 'of the best kind'

used mainly on the computer, as in, when you want to say somethings best kind outload, you do not say the letters bk. you say best kind.
Computer Chat;
Newfie 1: Hey, what do you think of Randy?
Newfie 2: He seems bk sure.

Face-To-Face Talking;
Newfie 1: Hey, what do you think of Randy?
Newfie 2: He seems best kind sure.
by hahaiefwhiuhd January 08, 2011

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bk
Boner Killer. A person, image or situation that kills your boner
dude, that ugly chick was a total BK
learning that i had 4 exams that day was a wicked BK
by the manmeister June 21, 2007

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bk
A kid that is bad, in other words a bad kid. Mainly bad at everything. A bad kid can never do anything right or well, he or she sucks at everything, alot. bad kid Levi Jay
Man, that Levi kid is a bk to the max!!!
He cant even ollie on his skateboard!!!
by JC Bullivan July 27, 2006

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bk
Blood killa, Slob killa, Snoop killa, Piru killa, British knights, Burger King, Crips, Blue Team, True Gangstaz, Authentic Gangstaz.
Eazy E, Snoop Doggy Dogg, Ice Cube, Kurupt, Biggie, C-Murder, Nate Dogg, Trick Daddy, Mack 10, W.C., Scarface, and all real gangstaz besides the mafia (Not a blood mafia either, cuz').
by Greez' February 09, 2004

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bk
Buzz-Kill - Sometimes a thing but most often a person that kills your ecstasy buzz in 1986. Any Debbie Downer during times of inebriation.
It was a real bk when Laura showed up, she's so fucking needy and all the coke was already gone.
by Kdub83 May 22, 2014

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