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A primed cannon is when a man's penis is erect and sticking out of the fly/waistband of his underwear/pants, but his balls are not. Can almost be considered the opposite of pitching a tent.

The primed cannon sticks out of the ship, but the balls and seamen are safely stowed inside.
"My dad walked in on me in the bathroom this morning."

"Agh, gross."

"What's even worse is he didn't seem to notice his morning wood was a primed cannon..."
by Mr. Whim September 08, 2009
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Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
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