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Jyutping san4 san4 ging1 ging1
Pinyin shén shén jīng jīng

Definitions (CC-CANTO)
  1. describes a person who acts strangely (like a mentally ill person)
Definitions (粵典–words.hk)
  1. 形容詞
    神經​有​問題​、​唔​正常
    insane, lunatic
Definitions (Kaifangcidian)
  1. 精神不正常
  2. 精神緊張 – 精神紧张
  3. 過於敏感 – 过于敏感