Gorgoth

Gorgoth is a demon lord of ooze, decay, and excrement. It's appearance is that of a large bulbous humanoid mass dripping with sickly puss and bodily fluids. It's body and face are covered in sores and potch marks, when it even bothers to take a humanoid form. Often times it is a shapeless grotesque mass.
If there was a representation of repulsion, Gorgoth would be that paragon. It loves disease, rot, and filth. It only exists to absorb more filth unto itself, usually by corrupting followers or partially digesting sacrifices.