poop2Pronunciation: /puːp/Definition of poop verb North American informal 1 [with object] (often as adjective pooped) exhaust:I was pooped and just flopped into bedPhrasal Verbs poop out stop functioning:the analogue tape fluttered slightly in pitch but didn’t poop outOrigin: 1930s: of unknown originpoop in other Oxford dictionaries Definition of poop in the US English dictionary