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Jyutping sei2 dou1 bat1 zi1 dou6 zam2 mo1 sei2 dik1
Pinyin sǐ dōu bù zhī dào zěn me sǐ de

Definitions (Wiktionary)
  1. phrase
    sure to die a reckless death
    (syn.) 死都唔知点死, 死都唔知點死