pooper

Short definition from Wiktionary

Noun

1. 1
   The anus; often in reference to anal intercourse.
2. 2
   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.
3. 3
   A selection in a slot machine game that ends the picking bonus.
4. 4
   One who poops; or, poops well.
5. 5
   One who poops; or, poops well: An infant.
6. 6
   A toilet.
7. 7
   Clipping of YouTube Pooper.
8. 8
   Alternative letter-case form of pooper (“creator of YouTube poops”).