Translation guide
How to say 'fart' in Japanese, from casual to polite, including related expressions and onomatopoeia.
fart (noun)
The most common, everyday way to say 'fart' among friends or in informal settings.
The standard, slightly polite but still casual word for 'fart'. Used by all ages.
A blunt, somewhat vulgar word for 'fart'. Often used in set phrases or by men.
Childish onomatopoeia for a fart sound. Used with small children.
How to refer to farting in polite conversation or formal contexts.
Even in polite contexts, 'おなら' is acceptable. There is no highly formal single word.
How to say the action of farting.
Standard verb phrase. 'をする' can be replaced by 'が出る' for involuntary action.
He farted on purpose.
Sound words for farting.
General onomatopoeia for a fart sound. Can be used as a verb with 'と' + '言う/鳴る'.
Phrases and idioms involving farts.
Idiom meaning 'a piece of cake' or 'no big deal'. Literally 'a kappa's fart'.
While おなら is acceptable in casual settings, in very formal situations it's better to use euphemisms like ガスが出る or simply excuse yourself without naming the act.
おなら is the standard, everyday word. 屁 is more vulgar and often used in set phrases or by men. Children and women tend to avoid 屁.
I'm about to fart. (neutral)
I farted. (vulgar)
It's nothing. (lit. 'not even a fart')
Oh, you farted! (to a child)
Excuse me, I accidentally farted.
Euphemistic phrase meaning 'to pass gas'. More indirect and polite.
I have gas buildup and feel like I might pass gas.
I accidentally farted.
Vulgar verb phrase. 'こく' is a crude verb for emitting something.
Damn, I farted.
Formal, technical term. Used in medical or scientific contexts.
I often fart after meals. (clinical)
おならがブーッと出た。
A fart came out with a 'pfft'.
Softer, cuter sound, often used for children or small farts.
The baby farted with a little 'poof'.
A silent but smelly fart. 'スカシ' means 'silent', '屁' is fart.
Did someone do a silent fart? It stinks.
That's a piece of cake.
Sophistry, far-fetched argument. Literally 'fart logic'.
He always makes sophist arguments.
屁をこくな！
Don't fart! (rough)