zombie (n.)

1871, of West African origin (compare Kikongo zumbi "fetish;" Kimbundu nzambi "god"), originally the name of a snake god, later with meaning "reanimated corpse" in voodoo cult. But perhaps also from Louisiana creole word meaning "phantom, ghost," from Spanish sombra "shade, ghost." Sense "slow-witted person" is recorded from 1936.