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Jyutping lou1 gaa1
Pinyin lāo jiā

Definitions (CC-CANTO)
  1. (noun) a gang member; a triad member; a thug; someone who makes a living by doing illegal things like cheating and stealing
Definitions (粵典–words.hk)
  1. 名詞
    做​非法​生意​嘅​人
    a dealer in illegal or stolen goods, a racketeer, a "shady operator"
Definitions (Wiktionary)
  1. noun, Cantonese
    thug; triad member
Definitions (Kaifangcidian)
  1. 老油子
  2. 慣家 – 惯家
  3. 流氓