poperoppigus Share definition Flag A poperoppigus is a word describing a dumb, idiotic and moronic person. They have to be dopey and may be on drugs. Person 1: “isn’t she on drugs?” Person 2: “yeah, she’s a poperoppigus!” Person 1: “yep” poperoppigus by Mommabetty October 24, 2017 Get the poperoppigus mug.