Top Definition
Instant diarrhea. A violent form of diarrhea that consists of hot liquid shit ejected from the rectum within 10 minutes of eating any food containing dairy and/or grease, such as a cheeseburger or pizza.
Every time I eat at McDonald's I get instarrhea.
by Rosco Mishi Yaso June 18, 2008
5 Words related to Instarrhea

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