Poosyio Share definition Flag A scaredy-catPronounced as: "Poosy-yo" Person 1: gets scared and hides in the corner.Person 2: That guy is a poosyio Poosyio by Flash Star-Wars June 3, 2021 0 0 Get merch Get the Poosyio mug. Buy Now — $32.95 See more merch