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Jyutping hou3 niu5
Pinyin hǎo niǎo

Definitions (Wiktionary)
  1. noun, colloquial, derogatory, in the negative
    nice person; good fellow
  2. noun, literally
    good bird; (literary) sweet-singing bird or bird with a beautiful plumage

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Jyutping hou2 niu5
Pinyin hǎo niǎo

Definitions (CC-CEDICT)
  1. person of good character
  2. nice person
  3. bird with a melodious voice or beautiful plumage