Translation guide
The English word 'poop' is a casual, often childish term for feces. In Japanese, the most common equivalent is うんち (unchi), used especially with children. Other terms vary by formality and context.
The speaker wants to refer to feces in a casual, childish, or informal way, similar to 'poop' in English.
The most direct equivalent of 'poop'. Used mainly by/with children, or in very casual adult conversation. It's cute and informal.
Slightly more vulgar/childish than うんち. Often used by boys or in a joking manner. Can be considered a bit crass.
うんこをもらした。
I pooped my pants.
Formal/medical term for feces. Not used in casual conversation; sounds clinical.
大便の検査をします。
We will test your stool.
The speaker wants to express the action of defecating in a casual way.
The standard casual phrase for 'to poop'. Literally 'to do a poop'.
赤ちゃんがうんちをした。
The baby pooped.
More vulgar/childish version of 'to poop'.
うんこをしたい。
I want to poop.
Formal/medical verb for 'to defecate'. Used in clinical contexts.
毎日排便することが大切です。
It is important to have a bowel movement every day.
Using うんち or うんこ in formal or polite conversation can sound childish or rude. In medical or formal contexts, use 大便 (だいべん) or 排便 (はいべん).
うんち is softer and more commonly used with young children. うんこ is slightly more vulgar and often used by boys or in jokes. Both are casual.