poopy /ˈpuːpi/adjective 5noun 1forms 3 adjective5 •(informal) Dirty with feces. •(informal) Resembling or characteristic of feces. •(informal) worthless; unpleasantYou don't throw a six-year-old into a sandbox and say: "Hey! You can only make poopy castles!" You know when you take wet sand and just let it drip on top of a pile of sand? It's a poopy castle. — 2014 •(slang) Depressed, weak, or worthless.Who can feel poopy when they wander to the room where hot soup, bread, and cereal regularly make their appearance? — 2011 •(informal) needing to poop (defecate)Can we stop the car? I'm poopy. noun1 •(informal, slang) Faeces. formspoopies · poopier · poopiest