Definition of poop noun in Oxford Advanced Learner's Dictionary. Meaning , pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Noun (1) the mother cat carefully cleaned poop off her newborn kitten's bottom Noun (3) the poop was that the ship would be headed to the war zone within a matter of weeks Poop color can indicate one’s health state by giving some clues about his diet and lifestyle or the presence of gastrointestinal infection. Know when to seek help. (informal, reflexive) To defecate on one's person. You'll poop yourself if you have to walk all five miles home without stopping. poop (countable and uncountable, plural poops ) The dog poop is on the grass. ‘I’m goin’ down the backyard for me mornin’ poop .’. Two minutes passed - five - seven - ten. "Poop! Poop!"