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Jyutping gau2 sing3 jyu4 man4
Pinyin jiǔ xìng yú mín

Definitions (Wiktionary)
  1. noun
    jiuxing yumin; "nine surnames fisherpeople" (a pariah group living by the Qiantang River)
    (syn.) 九姓漁戶, 揢鱼个, 九姓渔户, 揢魚個, 船浪人