pooper

noun7

1. •
   (informal, rare) One who poops; or, poops well.

   • Jimmy's toilet training is finally over; he's becoming a good little pooper.
2. •
   (slang) One who poops out on an activity; one who dampens the mood by lack of participation or negative attitude. Mostly used in the phrase party pooper.

   • I wanted us to have fun today. You're such a pooper cleaning the house now!
3. •
   (slang, vulgar) The anus; often in reference to anal intercourse.

   • She likes it up the pooper.
4. •
   (slang) A toilet.

   • "Here I sit, on the pooper, giving birth to a Maine state trooper." — 2001
5. •
   (informal, rare) An infant.
6. •
   (Internet) Clipping of YouTube Pooper.

   • For whatever reason – the terrible animation or the absurd dialogue, most likely – these cutscenes are popular among poopers. — 2012
7. •
   A selection in a slot machine game that ends the picking bonus.