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Jyutping coi4 gou1 baat3 dau2
Pinyin cái gāo bā dǒu

Definitions (CC-CEDICT)
  1. of great talent (idiom)
Definitions (粵典–words.hk)
  1. 形容詞
    好​有​才​華​,​特​別​喺​文​藝​同​學​術​範​疇​上
    greatly talented, especially in the fields of arts and academics
    • 你才高八斗,軍師呢個稱呼你當之無愧。
      你才高八斗,军师呢个称呼你当之无愧。
      nei5 coi4 gou1 baat3 dau2, gwan1 si1 ni1 go3 cing1 fu1 nei5 dong1 zi1 mou4 kwai5.
      You're greatly talented, which makes you well-deserving of the title of strategist.
Definitions (Wiktionary)
  1. phrase, idiomatic
    of great talent
Examples (粵典–words.hk)
  1. Cantonese
    才高八斗
    才高八斗
    coi4 gou1 baat3 dau2
    • exceptionally gifted
  2. Cantonese
    素闻太师才高八斗。
    素聞太師才高八斗。
    • I heard that you, master, are very talented.
  3. Cantonese
    你才高八斗,军师呢个称呼你当之无愧。
    你才高八斗,軍師呢個稱呼你當之無愧。
    nei5 coi4 gou1 baat3 dau2, gwan1 si1 ni1 go3 cing1 fu1 nei5 dong1 zi1 mou4 kwai5.
    • You're greatly talented, which makes you well-deserving of the title of strategist.