Zombie

noun

1. A snake god or fetish in religions of West Africa and elsewhere.
2. (voodoo, superstition) A person, usually undead, animated by unnatural forces (such as magic), with no soul or will of his/her own.
3. A deceased person who becomes reanimate to attack the living.
4. An apathetic person.
5. A human being in a state of extreme mental exhaustion.

   "After working for 18 hours on the computer, I was a zombie."