うんち

Register: Childish but widely used. The standard term when talking to or about children, pets, and in casual conversation among adults.

Variant: うんこ is a rougher/cruder variant with the same meaning.

Common expressions

• うんちする (to poop)
• うんちが出(で)る (to have a bowel movement)

Alternatives: More formal terms include 大便(だいべん) (clinical) and 便(べん) (medical). Polite euphemisms include お通(つう)じ (bowel movement) and 大(おお)きい方(ほう) (lit. 'the big one').