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Jyutping ngo4 mou4 zi2
Pinyin è máo zi

Definitions (Wiktionary)
  1. noun, derogatory, ethnic, slur
    Russian person; Russki
    (syn.) 俄國佬, 俄國人, 老毛子, 俄羅斯人, 毛子, 俄毛子