kebsis
In Shadorgian mythology, Kebsis is the lord of all things foul in general, and the master of poop in particular. He is usually depicted as a fairly benign entity, often taking the guise of a masked poop-avatar to fight criminals and wrongdoers at night. In other eras he is seen as a Satan-like figure, killing innocents with crap and flinging them into his poo and vomit filled dimension, leaving them there to their shitty fate for all eternity.
'If you flush the toilet three times after midnight and then crap on the floor, Kebsis will come to get you.'