拿棒槌当针

Traditional (Taiwan): 拿棒槌當針

nábàngchuidàngzhēn ㄋㄚˊ ㄅㄤˋ ˙ㄔㄨㄟ ㄉㄤˋ ㄓㄣ

    • to take something crude for something genuine
    • to believe everything naively

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
take a laundry club for a needle
Meaning
To take something crude for something genuine; to believe everything naively. Mocking.

Sources