東風射馬耳

Simplified: 东风射马耳

dōngfēngshèmǎ'ěr ㄉㄨㄥ ㄈㄥ ㄕㄜˋ ㄇㄚˇ ㄦˇ

    • to let advice or news go in one ear and out the other
    • to be unmoved by what one hears

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
the east wind blows into a horse's ear
Meaning
Words that go in one ear and out the other; someone hears advice or news and doesn't react. Mildly critical; like 'water off a duck's back'.

Sources