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Jyutping mou4 so2 cou3 sau2
Pinyin wú suǒ cuò shǒu

Definitions (Wiktionary)
  1. phrase, idiomatic
    Synonym of 無所措手足/无所措手足 (wú suǒ cuò shǒu zú, “to be at a loss as to what to do”).
    (syn.) 無所措手足, 无所措手足