another word for penis
My jack is stiff.
by Sagan Hater October 11, 2014

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Anything
Man, did you see that?!

Naw, I didn't see jack!
by Damastah April 09, 2014

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Jack is a nice guy who can sometimes be the worlds biggest douche bag when it comes to everything. When he isn't being a douche bag(1 in million chance, possibly never) he can be a really top-class guy who's fun to be with and is great at playing with friends on games. Play any game with him and he will kill you and he will enjoy it, making you feel annoyed and want to stab him in every part of his body.

Guy: WTF! why did you kill me?
Jack: you might have been a traitor
Guy: but I wasn't
Jack: That's what a traitor would say
Guy; Stop being such a Jack
Jack; But I am Jack
by muchispac February 23, 2014

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A pretty cool guy, who's well-known as player. His full name is actually Jack Sparrow. If you ever see him, you should try to get his autograph immediately.
A: Dude man, who's that?
B: He's Jack, Jack Sparrow.
A: Dude, I gotta get his autograph
by unstoppableyolo January 01, 2013

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A supermegafoxyawesome hot guy that unfortunately you can't get over. Amazing personality and beautiful eyes and an awesome smile. Nice arse.
Guy 1: Dude, I wish I could be like Jack
Guy 2:His abs are to die for
by MZOND69 February 22, 2012

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Slang for cigarette like shorts, cig or bogie. Created in the DC area years ago and used by a lit of people that smoke ports.
Yo, can I bum a jack? I'm going to smoke a jack. I need to go to the gas station to get some jacks.
by pens66871 September 14, 2011

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a man, of usually an older age, who is the man. he does whatever he pleases and doesn't care what anybody else thinks. he has a good sense of humor and can be found often laughing at his own jokes. he likes to tell younger men about his stories from back in the day, and most of the stories are legendary. he is respected by all who walk among him. (JACK must be spelled with all capital letters)
"that man over there is JACK and is always telling me crazy stories about his glory days."
by Michiganfan4 November 18, 2009

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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