A large fecal particle, commonly described as "poop", that is quickly released from the anal cavity and shot out as if it were a cannonball. This can sometimes cause a sense of shock and quick sense of pain to the rectum.

Can easily create a large blast of water to the shooter's anus. Usually recognized by it's appreciable "ploop" sound.
John Doe: "I was really turtle necking that shit and when I finally got to the bowl I just poop shotted that little bastard right out of my ass."
by Sebastianave January 8, 2012
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