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Jyutping hyut3 hau2 pan3 jan4
Pinyin xuě kǒu pēn rén

Definitions (Wiktionary)
  1. phrase, idiomatic
    to make unfounded and malicious attacks upon somebody; to venomously slander

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Jyutping hyut3 hau2 pan3 jan4
Pinyin xuè kǒu pēn rén

Definitions (CC-CEDICT)
  1. to spit blood (idiom); venomous slander
  2. malicious attacks
Definitions (Wiktionary)
  1. phrase, idiomatic
    to make unfounded and malicious attacks upon somebody; to venomously slander
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)