Jackal

Webster's Dictionary of the English Language

·noun One who does mean work for another's advantage, as jackals were once thought to kill game which lions appropriated.

II. Jackal ·noun Any one of several species of carnivorous animals inhabiting Africa and Asia, related to the dog and wolf. They are cowardly, nocturnal, and gregarious. They feed largely on carrion, and are noted for their piercing and dismal howling.