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Jyutping jyu5 ging1 sei3 zo6
Pinyin yǔ jīng sì zuò

Definitions (Wiktionary)
  1. phrase, idiomatic
    one's words or speech astonishes every attendee

語驚四座 [语惊--]

Jyutping
Pinyin yǔ jīng sì zuò

Definitions (CC-CEDICT)
  1. to make a remark that startles everyone present (idiom)
  2. (of a remark) startling