So they didn't really specify "zombie."
zom?bie
1. (in voodoo) a. the body of a dead person given the semblance of life, but mute and will-less, by a supernatural force, usually for some evil purpose.
b. the supernatural force itself.
2. Informal . a. a person whose behavior or responses are wooden, listless, or seemingly rote; automaton.
b. an eccentric or peculiar person.
3. a snake god worshiped in West Indian and Brazilian religious practices of African origin.
4. a tall drink made typically with several kinds of rum, citrus juice, and often apricot liqueur.
5. Canadian Slang . an army conscript assigned to home defense during World War II.
There's a lot that would fall under the informal" definition 2 a&b.