大便的英文:Feces
痾屎的英文:to excrete feces
Feces, faeces, or fæces (see spelling differences) is waste product from an animal's digestive system tract expelled through the anus
(Feces From Wikipedia, http://en.wikipedia.org/wiki/Feces)
In daily conversation, people will say something like...
- go to bathroom
- go to number 2
- take a dump
- need to poop
- take a shxx (xx means 2 letters other than x).