BK
Boner Killer

A man or woman who has turned your fully erect penis flaccid
I was gonna have sex with that girl until I saw her misshapen booty, it was such a BK!
by thachingster August 17, 2010

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BK
stands for Boner killer. when a girl is so ugly that when you think of her your wood instantly goes away.
louis: yo did you see the girl over there?
Bruce: yo she's a BK
by vindcated March 20, 2010

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Stands for "Bad Kid"
"Yo dat kid ovaa there is a B.K. gangsta fo sho."
by MC.BE March 27, 2009

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bk
Stands for "Boner Killer". In the vulgar terms it is literally a boner killer. In other terms it is the act of ruining the moment. Try to avoid being a BK it may lead to others in disappointment or anger.
Sam: Want to watching The Village?
Bill: No that movie's a bk!


Bill: What time do you have to go home?
Sam: My parents want me home at 10.
Bill: What a BK

Bill: Want to go bowling?
Sam: I got to go home. My plant needs watering.
Bill: You're such a bk!
by kandabear January 08, 2009

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bk
a bad kid. an exclusive club. full of exclusive benifits. when you are a bk you do certain things like fall of picnic tables and throw stickers on the ground and stick the back part on. bk fo life.
matt-"wheres my board dude"
ryan + will-"what a bk"
no you cannot be a bk. you are a lk (lonely kid) and a fk (fat kid).
by pleef January 13, 2008

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BK
Of or being an extreme bitch, a person who steals only to cause pointless destruction, often a BK is gay and/or transexual and usually attempts to cause homo bodily harm to those around him/her (Ultimate buzz kill)
Person 1: Why did you shit on my bed?
BK: Because I just finished pissing in it!
Person 1: You are such a fuckin BK!
BK: (((giggles like a gitty little 3rd grade school girl)))

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bk
Brooklyn New York
Brooklyn NYC
by Ripper June 21, 2003

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The Urban Dictionary T-Shirt

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