zombocalypse UK /zɒmˈbɒkəlɪps/US /zɒmˈbɑkəlɪps/ noun1 •(slang) The breakdown of society as a result of a zombie outbreak.The makers of "Zombieland" disagree though, and their film is an excellent argument that even the zombocalypse can be funny. — 2009 formsZombocalypses