scooby-poo Share definition Flag a mysterious poop, a poop that has an unknown owner; a poop that is in the shape of a question mark Josh: "Holy shit! Who left a huge fucking scooby-poo in the toilet?" scooby-poo by supersayings October 6, 2022 0 0 Get merch Get the scooby-poo mug. Buy Now — $32.95 See more merch