Top Definition
gross jello or jello thats older then you and your newish fridge
Ex:
Woman: Throw out that jelloco!!!!!

Man: But hunny its been in the fridge before we moved. Its practicly family. Every morning when i get milk in my cereal i have to say "hi loving uncle jelloco.
by woooooooh dude thats cool April 12, 2009
6 Words related to jelloco

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