named for the metaphor of bringing a cannon (like a small civil war cannon) to a party to do one of two things

1. Pulled when someone says something toolish

2. Used to disperse a crowd in a bar of people you don't like.
1. Sam and Rick outside during smoke break
Sam: Hey Rick, it's your birthday coming up and we should celebrate. let's do something cool; we'll make it a party
Rick: No can do, I have some work to do. Anyway, I really enjoy work and think get-togethers are getting sort of old, you know?
Sam: *imitates pulling the draw string of a cannon* Party Cannon! That is the lamest toolish piss I've ever heard. Take your head out of your ass and let's go celebrate your fuckin' birthday.

2. Paul: Joe pulled out the party cannon when the Stamp collectors association started singing at his favorite bar. It dispersed them, and then Joe and his friends could drink and have a good time in peace.
by Fuckin' ender of all tools December 30, 2008

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Top Definition
Pinkie never leaves home without one.
'I never leave home without my party cannon!'
by TriariusTheThird January 07, 2012

The Urban Dictionary Mug

Lotsa space for your liquids.

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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.

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.

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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