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Jyutping gwai2 ling4 zing1 gwaai3
Pinyin guǐ líng jīng guài

Definitions (CC-CANTO)
  1. mischievous; strange; grotesque; weird; bizarre; quick-witted
Definitions (粵典–words.hk)
  1. 形容詞
    唔​正常​、​唔​主流​,​通常​有​捉弄人​嘅​意味
    strange, unconventional, out of the ordinary, often playful or mischievous
    • 佢有好多古靈精怪嘅念頭。
      佢有好多古灵精怪嘅念头。
      keoi5 jau5 hou2 do1 gu2 ling4 zing1 gwaai3 ge3 nim6 tau4.
      He has a lot of strange and mischievous ideas.
  2. 參看
    古靈精怪