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.
by theamazingjmo June 2, 2016
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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.
by Some Koreann June 26, 2010
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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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An ambiguous object. Possibly:

a) a cigar because one end burns like the fuse on a cannon
b) a blunt (cigar filled with weed) because after you smoke it you're head is going to explode.
c) any form of firework
d) a penis, cause after you suck it, it explodes in your face
e) a person, because they could blow you to bits in some way (pwn you)
f) the muscles (usually arm) of a person, because cannons are just bigger guns
g) a firearm, preferablly the one you use to kill the person using this ambigous word in front of you. Don't use this word, people will have no clue what you're talking about.
"What did you just say? Cannon?"
by K` October 16, 2005
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Verbally shut down, counterpointed by overwhelming evidence, or just zinged badly.
You got NO neck, ya house got NO ceiling, you eat chicken with NO meat, and ya window IS ya front door.

Oooohh cannoned!
by Ben Berkowitz March 20, 2008
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