poop2 Syllabification: (poop)Pronunciation: /po͞op/Definition of poop verb [with object] (often as adjective pooped) informal exhaust:I was pooped and just flopped into bedPhrasal Verbs poop out stop functioning:the analog tape fluttered slightly in pitch but didn’t poop outOrigin: 1930s: of unknown originpoop in other Oxford dictionaries Definition of poop in the British & World English dictionary