泥を塗る（どろをぬる）

Japanese vocabulary

Meaning: to besmirch; to sully

Idioms & proverbs containing “泥を塗る”

顔に泥を塗る (かおにどろをぬる) — to bring disgrace (dishonor, dishonour) on; to fling mud at; to put to shame

See it used in real works