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Jyutping m4 zi1 hou2 cau2
Pinyin wú zhī hǎo chǒu

Definitions (Kaifangcidian)
  1. 不知好歹

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Jyutping m4 zi1 hou2 cau2
Pinyin n2 zhī hǎo chǒu

Definitions (CC-CANTO)
  1. doesn't matter if it is good or bad/one who does not accept kindness or good intentions from others