Usually said in a low whisper wile on the phone to annoy one's friends, often said repeatdly.and causes one's friend to hang up after annoyance.sometimes used for pranks.
(ring,ring)
Cody-Hello?
August-poop in my butt Cody- omfg im gonna hang up
August-poop in my butt Cody-that's it im telling jesus.
(hangs up)
During the act of anal sex, or due to insertion of the penis into 1. a female, 2. a male, or 3. an animals anus, particulate matter of feceswill escape with the departure of the penus, causing thus forth, a "poop monster"