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Jyutping muk6 mou4 cyun4 ngau4
Pinyin mù wú quán niú

Definitions (CC-CEDICT)
  1. to see the ox already cut up into joints (idiom); extremely skilled
  2. able to see through the problem at one glance
Definitions (Wiktionary)
  1. phrase, idiomatic
    supremely skilled
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)