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Jyutping mou4 zi1 mong5 syut3
Pinyin wú zhī wàng shuō

Definitions (Wiktionary)
  1. phrase, idiomatic
    ignorant twaddle; ignorant nonsense
    • 因為這種議論或批評,沒有經過周密調查,不過是無知妄説。
      因为这种议论或批评,没有经过周密调查,不过是无知妄说。
      yīn wèi zhè zhǒng yì lùn huò pī píng , méi yǒu jīng guò zhōu mì diào chá , bù guò shì wú zhī wàng shuō .
      For such views or criticisms, which are not based on thorough investigation, are nothing but ignorant twaddle.