A Quth-Maren is a revolting undead creature created by clerics of Kiaransalee. These Clerics enjoy flaying their enemies--removing every strap of skin--and then animating them in this hideous form.

A Quth-Maren bears the overall forum it did in life, but it has no skin or exposed fat (Yech!)

This is a also considered a minor demon to some clerics. This Monster is from the Forgotten Realms Fantasy world (Dungeons & Dragons).