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Jyutping mou4 wong5 bat1 sing3
Pinyin wú wǎng bù shèng

Definitions (Wiktionary)
  1. phrase, idiomatic
    ever-victorious; invincible
    (syn.) 无往而不胜, 無往而不勝
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)