尻しり拭ぬぐい

noun

cleaning up someone else's mess; making up for someone else's mistake

Idiomatic use: taking responsibility for another person's failure or trouble, often reluctantly. Commonly used with する (e.g., 尻拭いをする).

• 上じょう司しの失しっ敗ぱいの尻しり拭ぬぐいをさせられた。

  I was made to clean up my boss's mess.

• いつも彼かれの尻しり拭ぬぐいをするのはもう嫌いやだ。

  I'm tired of always having to fix his mistakes.

noun

ass-wiping; arse-wiping

Literal meaning: the act of wiping someone's bottom. Rarely used in modern Japanese outside of explaining the idiom's origin or in very crude contexts.

• 「尻しり拭ぬぐい」は文も字じ通どおりには尻しりを拭ふくことを指さすが、今いまではほとんど使つかわれない。

  Literally, 尻拭い means wiping someone's bottom, but it is hardly used that way nowadays.