神又係你鬼又係你 [－－系－－－系－]

Jyutping san4 jau6 hai6 nei5 gwai2 jau6 hai6 nei5
Pinyin shén yòu xì nǐ guǐ yòu xì nǐ

Definitions (粵典–words.hk)
  1. 語句
    形容​對方​同時​扮演​兩個​立場​相反​嘅​角色​去​靠害
    describes someone who play both sides simultaneously; literally: sometimes you're a good spirit sometimes you're a bad spirit