Longman Dictionary of Contemporary English - poop

~1 n 1 technical the raised part at the back end of an old sailing ship 2 the poop AmE informal the latest news about something that has happened, which is told to you unofficially by someone; lowdown  (Come on, Dan, what's the poop? Are they hiring Collins?) 3 AmE informal a word meaning solid waste from your bowels, used especially by children; poo (1) BrE 4 AmE informal a word meaning the act of passing waste from your bowels, used especially by children; poo (2) BrE ~2 v AmE informal a word meaning to pass solid waste from your bowels, used especially by children; poo BrE  (- see also party pooper) poop out phr v AmE informal 1 to stop trying to do something because you are tired, bored etc  (Ouida pooped out about halfway through the race.) 2 to decide not to do something you have already said you would do, because you are tired or not interested  (poop out on sb)  ("Is Bill coming along?" "Nah, he's pooping out on us.")