Yugmort the Many-Fanged is a monster in Merle's Cabin of Despair and Occult Museum.
He only appeared in the episode The Quest for the Holy Quail. Merle tried to feed Queen Griddle to Yugmort, but Griddle, while welcoming whatever fate awaited her due to the idea of King Allfire's unwillingness to save her (over his quest for the Holy Quail, though admittedly he did not read the ransom letter), yelled at Yugmort for interrupting her soliloquy, and he ran away crying.