打下手

dǎxiàshǒu ㄉㄚˇ ㄒㄧㄚˋ ㄕㄡˇ

    • to act in a supporting role
    • fig. to play second fiddle

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Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
work as the lower hand
Meaning
To work as someone's assistant, such as a kitchen helper.

Sources