An individual who is always running to the toilet with explosive crapping power, which means that anybody else in the house will hear him or her blowing ass in the other room. A shattapottamus will shit him or herself if they don't get to the bathroom quickly because of severe stomach cramps that creates his or her explosive crapping power. This individual can create a stench in the bathroom that will peel the paint or wall paper off of the wall.
Q: Have you ever noticed that Trey is always running to the bathroom several times a day?
A: Yeah Trey is a shattapottamus because he has the most explosive crapping power I have ever seen because I can hear him blowing ass in the other room, which creates a stench that will clear a room quickly.