Top Definition
a party with high aspirations, but ends up being a boring sausagefest. Typically held by Canadians and usually ends in a fight, which is held by the whiny-bitch host.
Daniel: Hey bro did you go to that party last night?
Alex: Ya man but it ended up being a jack back.
Daniel: Dude that sucks.
Alex: Ya I thought it be good. But it ended up being a boring sausagefest and we just watched the laker game.
by Beefer Dude January 05, 2012

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Jack Back

1. To steal something back from someone who stole from you (i.e. jacked you).

2. To jump, attack, or otherwise harm in retaliation for the same thing having been done to you.

Popularized by the rap song of the same name.
Guy 1: Hey, there goes that dude who stole my Cd's

Guy 2: Did he lock his car door?

Guy 1: No, let's hit him with a jack back!
by MastaRoe March 17, 2010

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An episode of LOST that is Jack-centric.
"Dammit! ANOTHER jackback this week?
by skc107 May 30, 2007

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Lotsa space for your liquids.

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Your favorite word on a white mug.

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One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt