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Jyutping deng3 sei2 gau2
Pinyin zhěng sǐ gǒu

Definitions (粵典–words.hk)
  1. 形容詞
    形容​糕點​硬​到​可以​掟​死​一​隻​狗
    (of pastry, bread, cakes, etc.) hard
    • 掟死狗麪包
      掟死狗面包
      deng3 sei2 gau2 min6 baau1
      hard bread

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Jyutping deng3 sei2 gau2
Pinyin dìng sǐ gǒu

Definitions (CC-CANTO)
  1. to describe foods that are so hard that if it is used to hit a dog it will kill it, usually refers to hard bread like a baguette
Examples (粵典–words.hk)
  1. Cantonese
    掟死狗面包
    掟死狗麪包
    deng3 sei2 gau2 min6 baau1
    • hard bread