Fonzoon Share definition Flag A person that farts in the bathtub and bites at the bubbles; someone to be considered unintelligent and mentally handicapped. Nate: Man I hate Kyle, he's such a moron!Cody: Yeah that guy is a real fonzoon. Fonzoon by noupperlobeman July 11, 2012 0 0 Get merch Get the Fonzoon mug. Buy Now — $32.95 See more merch