Top Definition
to fart on the toilet
to fart loudly in a place that will create an echo
Honey what are you doing in there? "I had to fire the cannon"
by Embrey April 04, 2010

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A term for taking a massive dump, often accompanied by a loud, “explosive” release of gas
I’ll be back in a bit; had taco bell last night and I’ve gotta fire the cannon.
by Thewordmancometh March 11, 2010

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