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An overwhelming sense of pain, panic, cramping, and cold sweats that sweeps over someone when they are about to have diarrhea...especially if they are forced to hold it longer than they need to.

The feeling comes and goes, but gradually increases in when women give birth...but this time you are giving birth to a giant wet shit.
Jeff's poo contractions became stronger and more intense as he searched for a clean public bathroom. Thankfully, his sphincter was strong and held back the flow.
by Dooodooo Man March 11, 2008
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