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Jyutping gau3 meng6 dou6 cou2
Pinyin jiù mìng dào cǎo

Definitions (Wiktionary)
  1. noun, figuratively
    life-saving straw; straw to clutch at

救命稻草 [----]

Jyutping
Pinyin jiù mìng dào cǎo

Definitions (CC-CEDICT)
  1. (one's) last straw to clutch at
  2. one's last hope