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Jyutping ngau4 gou1 maa5 daai6
Pinyin niú gāo mǎ dà

Definitions (CC-CANTO)
  1. (adjective) tall and hefty; fully grown
Definitions (粵典–words.hk)
  1. 形容詞
    生​得​高大​,​已經​唔​係​細路​仔​嘅​身形
    (of a person's stature) tall and big; literally: as tall as a cow and big as a horse
    • 佢生得牛高馬大,但啲行為重好幼稚。
      佢生得牛高马大,但啲行为重好幼稚。
      keoi5 saang1 dak1 ngau4 gou1 maa5 daai6, daan6 di1 hang4 wai4 zung6 hou2 jau3 zi6.
      He's big and tall but still behaves childishly.
Definitions (Wiktionary)
  1. phrase, idiomatic, of a person
    robust and tall
Definitions (Kaifangcidian)
  1. 人高馬大 – 人高马大
  2. 五大三粗
  3. 又高又大
  4. 高大
Examples (粵典–words.hk)
  1. Cantonese
    佢生得牛高马大,但啲行为重好幼稚。
    佢生得牛高馬大,但啲行為重好幼稚。
    keoi5 saang1 dak1 ngau4 gou1 maa5 daai6, daan6 di1 hang4 wai4 zung6 hou2 jau3 zi6.
    • He's big and tall but still behaves childishly.