Top Definition
The act of entering a house party, recognizing that the party thrower's selected playlist is lame, locating the source of music, and hijacking the playlist to reflect your own superior musical taste.
Luke: "Dude, I can't believe they are playing bieber right now."

Matt: "Yeah man, I'm bout to go partyjack this and play some Genuwine!"
di CaliCrusher228 16 marzo 2013

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A person who, or the act of hijacking a party for your own purposes
person 1: hey you coming to jons going away party??

person 2: this the one at sara's?

person 1: yeah....

person 2: its was actually for sara's 20th but jon party jacked it for his going away
di gezawibles 01 giugno 2007

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When someone prepares a party well in advance with a group of friends and another 'friend' suddenly creates another party the day before the original party with the same group of friends thereby 'Party Jacking' the original party.
Jill sets a Christmas party on Dec 20th a month in advance for her group of friends, sends invites, hires a DJ, etc and then a week before, Emily decides to throw a Christmas party on Dec 19th with the same group of friends thereby 'Party Jacking' Jill's party. No Jill knows many of her friends will not show up to her party because they will be tired, hung over, not be able to get a baby sitter 2 nights in a row, etc, etc and is forced to cancel her party. Or if she does hold the party, it ends up being lame because few people show up due to already being partied out he night before.
di Incaico 05 dicembre 2013

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

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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
When someone prepares a party well in advance with a group of friends and another 'friend' suddenly creates another party the day before the original party with the same group of friends thereby 'Party Jacking' the original party.
Jill sets a Christmas party on Dec 20th a month in advance for her group of friends, sends invites, hires a DJ, etc and then a week before, Emily decides to throw a Christmas party on Dec 19th with the same group of friends thereby 'Party Jacking' Jill's party. Jill knows many of her friends will not show up to her party because they will be tired, hung over, not be able to get a baby sitter 2 nights in a row, etc, etc and is forced to cancel her party. Or if she does hold the party, it ends up being lame because few people show up due to already being partied out he night before.
di Incaico 05 dicembre 2013

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

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

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

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
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