look up any word, like the eiffel tower:
very loose bowel movements that come out of the rectum under high pressure, sometimes followed by a large quantity of air (e.g. 'air breathing' rocket ass)

diarrhea of such character as to resemble the contrail from a rocket launch
"Dude, I got the worst case of rocket ass the last time I ate tacos in Juarez!"
by Steve Ocean June 20, 2006