An orc or ork (/ˈɔrk/) is one of a race of mythical humanoid creatures, generally described as brutish, aggressive and repulsive. Orc facial features tend toward the grotesque (generally a mixture of the ape-like and pig-like), and their skin typically varies from black to grey to green. The orc has its origins in the writings of J. R. R. Tolkien. As such orcs are to elves as evil is to good, represented as enemies of light, and all that is holy, acceptable, pure and true.
These creatures have since become popular figures in other fantasy and science fiction literature as well as many types of fantasy games. They are variously portrayed as physically stronger or weaker than humans, but always high in numbers. They often ride boars, wolves, and wargs. In many role-playing and computer games, orcs have green or greenish skin (earning the name 'Greenskins' in such games as Warhammer Fantasy and Warhammer 40,000).