Asshole guy is a character first appearance in episode "Tub Boys."
It is known that asshole guy is named because he is cursed with seeing butt holes everywhere. He first met another person called "Butt Doctor." He tries to tell him what is going on but butt doctor figured that it was a curse. He was cursed by an old and homeless lady with a glass in her eye and strange clothing. The final appearance shows the old lady saying D*** HOLE!!! At the person and vanished.
Butt doctor-He tries to tell him what its going on but he assume it as a curse.
The old homeless lady-He is very against the homeless people and so especially the old lady.