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Jyutping paa3 zai2
Pinyin bā zǎi

Definitions (粵典–words.hk)
  1. 名詞、俚語
    大耳窿​同債​仔​之​間​嘅​中​間​人
    a intermediary between a loanshark and a debtor
  2. 名詞、俚語
    賭場​入面​負責​兑換​籌​碼​嘅​人
    someone responsible for changing gambling chips in a casino

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Jyutping paa4 zai2
Pinyin bā zǐ

Definitions (CC-CANTO)
  1. someone who acts as a middle man between a loan shark and a debtor; someone in charge of changing gambling chips in a casino [colloquial]