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Jyutping baak6 fan2 zai2
Pinyin bái fěn zǎi

Definitions (Wiktionary)
  1. noun, Cantonese
    drug addict; (or specifically) heroin addict
    (syn.) 白粉仙, 道友, 白粉友 heroin addict, 白粉佬 heroin addict, 白粉仔 heroin addict, 吸毒者, 吸毒人, 癮煙, 吃毒的人, 癮君子, 吸毒鬼, 白粉仔