Otyugh

Otyughs were strange aberrations that lived in caves, crypts, and sewers. They delighted in the eating of filth and offal. Because of this, many civilized beings attempted to capture and contain otyughs within their city sewers to use as a means of garbage disposal. Despite its appearance and habits, an otyugh was surprisingly intelligent and capable of speech.

Description
Otyughs were strange-looking creatures, with round bodies that stood on three elephantine legs. They had a pair of tentacles that ended in rows of sharp spikes. A third tentacle sprouted from the top of the otyugh's body. This tentacle ended in a number of peering eyes. The body of the creature contained a massive fang-filled mouth. Due to the nature of the otyughs' appetites, their mouths were filthy and often carried diseases.

Novels

 * Blackstaff (mentioned)

Computer games

 * Curse of the Azure Bonds
 * Secret of the Silver Blades
 * Pools of Darkness
 * Baldur's Gate II: Shadows of Amn
 * Icewind Dale II