A variation of diarrhea in which the contents of your bowels are violently discharged in an explosive manner. This was mentioned in a sketch on Conan O'Brien. I actually had this happen to me once. I was in Argentina and must have ate something weird. I was walking home and started having this really painful gas. So bad that I had to stop several times and wait for the pain to pass. I finally made it into my apartment and into the bathroom. Of course, the closer I got to the toilet the worse it got. I had to stand in front of the toilet and wait for another painful round of gas to pass before attempting to swivel around and sit down. Unfortunately I only got so far as pulling down my pants and underwear and turning before the explosion.