number two
noun/ˌnʌmbə ˈtuː/
/ˌnʌmbər ˈtuː/
[singular] (informal)- an expression used especially by children or when speaking to children to talk about passing solid waste from the body
（尤作为儿童用语）拉臭臭，拉屎 - Mum, I need a number two.
妈妈，我要拉㞎㞎。
- Mum, I need a number two.