A barbarian is humanoid. It is an omnivore.

They dressed alike-- in buckskin boots, leathern breeks and deerskin shirts, with broad girdles that held axes and short swords; and they were all gaunt and scarred and hard-eyed; sinewy and taciturn.

They were wild men, of a sort, yet there was still a wide gulf between them and the Cimmerian. They were sons of civilization, reverted to a semi-barbarism. He was a barbarian of a thousand generations of barbarians. They had acquired stealth and craft, but he had been born to these things. He excelled them even in lithe economy of motion. They were wolves, but he was a tiger.
Conan- The Warrior, by Robert E. Howard