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meaning that it is 'of the story' or something that could/did ACTUALLY happen in a story, used by fans and fanfictioners
Izzi: Gosh, Marrie, you really like the Harry and Ginny pairing for Harry Potter...
Marrie: Yeah, but it's totally cannon.
Izzi: I know, I read the seventh book

Jen: OMG! McGee and Abby are such a cute couple.
Dan: And it's cannon, have you seen the latest NCIS episode?
Jen: I know, Abby totally kissed McGee's head!!
by Guy McCracken April 27, 2009
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2
In Philadelphia this term is used to describe a violent or reckless person.
That youngan is a cannon.
by Lbs. December 23, 2006
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4
Awesome and amazing guy. Always there for you... and will do anything he can to make you happy. Extremely good looking and a flirt. The perfect boyfriend and the guy that every girl goes to for comfort and advice. Cannons are usually the dreamy guy that every girl would kill to have... but they never admit it to his face. He is always the one you want to be snuggling with because he knows how to handle a girl.
Girl 1: Who's the new guy?

Girl 2: I don't know... but he's gorgeous.

Cannon: Hey ladies (flashes a smile), I saw you too radiating beauty and I had to come introduce myself. I'm Cannon.

Girl 1: (whispers)- figures, Cannons are always the hot ones.
by the human britannica October 07, 2010
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5
1. A blunt (see blunt, L, philly, dutch, etc.) that is large in diameter. A blunt containing 3 or more grams of marijuana can safely be considered a cannon.
roll a cannon
spark the cannon
that cannon killed me man
by sherLocke October 24, 2005
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6
Another word for boobs, tits, rack, breasts, etc...
She had huge cannons!
by Kaayin December 09, 2004
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7
Quality gamer that causes bulletholes and blunt force trauma to ingame opponents.
hey that dude killed a lot of zombies...
yeah he's a cannon!
by tytass October 05, 2010
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