Definitions by Rosco Mishi Yaso

Instarrhea 

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.

Instarrhea by Rosco Mishi Yaso June 18, 2008