Cannon 

A musical instrument used in Tchaikovsky's 1812 Overture.

That cannon must be an instrument!

Cannon by alskfjkladsfj May 17, 2019

cannon 

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!!

cannon by Guy McCracken April 28, 2009

cannon 

In Philadelphia this term is used to describe a violent or reckless person.

That youngan is a cannon.

cannon by Lbs. December 29, 2006

Cannon 

Piece of garbage that fucked the trebuchet ruining my life

Fuck cannons!

Cannon by Trebuchet lover January 10, 2020

cannon 

An artillery piece, or something of that nature. I'm only writing this because I'm perturbed that the top definition for "cannon" is a misspelling of "canon." Are people really that stupid? I believe the answer is yes.

Canon is a totally different word than cannon.

cannon by theamazingjmo June 2, 2016

Cannon 

A Person that is a very funny person, a rare name given by some, and those who possess it, will be remembered by all. A all in all nice guy, powns at games, and a great lover to all women.

Jeffrey: dang i wish my name was cannon, mine is soo plain and original.

Sally: Yeaa, i wish your name was cannon as well.

Cannon by Some Koreann June 29, 2010

Cannon 

A super loud fart

MAN, that was a fucking CANNON!

Cannon by DesertFoxx April 16, 2015