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Jyutping lung4 tau4 daai6 lou2
Pinyin lóng tóu dà lǎo

Definitions (粵典–words.hk)
  1. 名詞
    黑社會​話​事人
    leader of a triad
  2. 近義詞
    江湖大佬

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Jyutping lung4 tau4 daai6 lou2
Pinyin lóng2tou dǎ4lao

Definitions (CC-CANTO)
  1. the Dragonhead, the leader of a triad gang [colloquial]