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Jyutping dei6 tau4 lung4
Pinyin dì tóu lóng

Definitions (粵典–words.hk)
  1. 名詞
    地方​入面​特別​有勢​力​嘅​人
    a powerful figure in a particular area; literally: local dragon
    • 佢係呢區嘅地頭龍嚟,入嚟做生意一定要同佢打招呼。
      佢系呢区嘅地头龙嚟,入嚟做生意一定要同佢打招呼。
      He is a powerful man in this area, those who wants to do business here must greet him first.

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Jyutping dei6 tau4 lung4
Pinyin di4tóu lóng

Definitions (CC-CANTO)
  1. someone who holds powerful influence over a particular area [colloquial]
Examples (粵典–words.hk)
  1. Cantonese
    佢系呢区嘅地头龙嚟,入嚟做生意一定要同佢打招呼。
    佢係呢區嘅地頭龍嚟,入嚟做生意一定要同佢打招呼。
    • He is a powerful man in this area, those who wants to do business here must greet him first.