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Jyutping lou5 zaap2
Pinyin lǎo zá

Definitions (粵典–words.hk)
  1. 名詞
    刑事​偵緝人​員​嘅​俗​稱
    colloquial address for a CID (Criminal Investigation Department) officer

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Jyutping lou5 zaap6
Pinyin lǎo zá

Definitions (CC-CANTO)
  1. a police officer who investigates crimes