Definition of "poop"

poop¹

/puːp/

verb
third-person singular simple present poops, present participle pooping, simple past and past participle pooped
1. (obsolete, intransitive) To make a short blast on a horn.
2. (obsolete, intransitive) To break wind.
3. (informal, childish, intransitive) To defecate.
noun
countable and uncountable, plural poops
1. (informal, often childish) Fecal matter; feces.
2. The sound of a steam engine's whistle, typically low-pitched.
  Quotations
  Two minutes passed - five - seven - ten. "Poop! Poop!" Everyone knew that whistle, and a mighty cheer went up as the Queen's train glided into the station.
  2001, Rev. W. Awdry, Thomas the tank engine collection : a unique collection of stories from the railway series - p. 157 - Egmont Books, Limited, Aug 15, 2001
interjection
1. (childish, euphemistic) Expressing annoyed disappointment.
  Quotations
  I don't need him for a friend. I can have fun by myself! ... Poop.
  1986 July 29, Bill Watterson, Calvin & Hobbes (comic)

/puːp/

/puːp/

verb
third-person singular simple present poops, present participle pooping, simple past and past participle pooped
1. (transitive) To tire, exhaust.
2. (reflexive) (with out) To become tired and exhausted.

/puːp/

noun
countable and uncountable, plural poops
1. (nautical) The stern of a ship.
2. (nautical) The poop deck.
verb
third-person singular simple present poops, present participle pooping, simple past and past participle pooped
1. (transitive) To break seawater with the poop (stern) of a vessel, especially the poop deck.
2. (transitive) To break over the stern of (a vessel).
  Quotations
  Another night, as we were scudding before a heavy gale of wind, and a tremendous sea rolling after us, we had the misfortune to be pooped, as the phrase is, by a wave or sea striking our stern, which stove in the cabin-windows, and rushing impetuously through the cabin, and along the main-deck, bore down all before it.
  1819, James Hardy Vaux, chapter 18, in Memoirs of James Hardy Vaux, volume 1, page 207
  Pooping is a hazard of another nature, and is also peculiar to the process of scudding. It merely means the ship's being overtaken by waters while running from them, when the crest of a sea, broken by the resistance, is thrown inboard over the taffrail or quarter.
  1838, Robert Walsh, The Museum of Foreign Literature, Science, and Art: Volume 33‎, page 376

/puːp/