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Jyutping sei2 jyu1 fei1 meng6
Pinyin sǐ yú fēi mìng

Definitions (粵典–words.hk)
  1. 語句
    中國術​數傳統​中​,​指一個​人​意外​死亡​,​令​佢​壽​命​比​本身​命格預​料​嘅​短
    In Chinese fortune-telling tradition, if a person who dies by accident, would make one's life become shorter then the original destiny as told by the fortune map (a chart of the whole life in fortune-telling result)

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Jyutping sei2 jyu1 fei1 ming6
Pinyin sǐ yú fēi mìng

Definitions (CC-CEDICT)
  1. violent death (idiom); to die in a disaster
  2. an unnatural death
Definitions (Wiktionary)
  1. phrase, idiomatic
    to die unnaturally; to die of accidents, murder or suicide
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)