Top Definition
a game were you sneak into a zoo when it is closed and break into the animals cages. You try to have sex with as many as you can before the animal kills/harms you because you were so stupid to do this. the more big and vicious the animal the more points you get

people were found dead in animals cages with no clothes on a couple times in the 90's
i was almost killed zoo zipping last night by the tiger
zoo zipper is fun while you are drunk
by petre101 January 05, 2010

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