When one or more individuals take a poop log, and swap it into each-others butt holes. In this process, the poop travels from the makers but into the next individuals butt hole. Invented in the Cave Man ages as a way to have fun with feces, this technique has been around for ages. Poop Swamping was used in the early ages to prevent colon cancer, and is prescribed by doctors today!
Poop Swapping is proven to clean the anus.
Johnny Bova and some of his friends decided they wanted to Poop Swap behind the school after hours.