"Saving people. Hunting things.The family business"- Dean Winchester
Wendigo:"It means "evil that devours." They're hundreds of years old. Each was once a man, sometimes an Indian or other times a frontiersman or a miner or hunter.[...]During some harsh Winter, a person finds themself starving, cut off from supplies or help -- becomes a cannibal to survive, eating other members of his tribe or camp. Cultures all over the world believe that eating human flesh gives a person certain abilities -- speed, strength, immortality. If you eat enough of it, over years, you become this less-than-human thing. You're always hungry". -Sam and Dean on Wendigo