Undead Cow Posted in U Best definition Undead Cow A cow that has come back from the dead to avenge the butcher who slaughtered it. Endorsed by PETA The ranch was overrun by a herd of undead cows. No one survived. How satisfied are you with the definition? Looking for Undead Cow meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 107 times.