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Jyutping san4 jau6 hai6 keoi5 gwai2 jau6 hai6 keoi5
Pinyin shén yòu xì qú guǐ yòu xì qú

Definitions (粵典–words.hk)
  1. 語句
    形容​他人​同時​扮演​兩個​立場​相反​嘅​角色​去​靠害
    used to describe a dishonest, two-faced person; literally: that person acts as a deity and a ghost at the same time

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Jyutping san4 jau6 hai6 keoi5 gwai2 jau6 hai6 keoi5
Pinyin shén yòu xì qú guǐ yòu xì qú

Definitions (CC-CANTO)
  1. (proverb) someone is acted as the devil and God