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Jyutping gwai1 daan2
Pinyin guī dàn

Definitions (CC-CANTO)
  1. (noun) turtle egg; (curse language) bastard; jerk
Definitions (粵典–words.hk)
  1. 名詞、俚語
    籠​統​攞​嚟​鬧​人​蠢​,​冇​膽​,​或者​衰​嘅​用​語
    a fool; a bad person; literally: turtle's egg
    • 你正一龜蛋!
      你正一龟蛋!
      You are such a bastard!
Definitions (Kaifangcidian)
  1. 龜兒子 – 龟儿子
  2. 王八蛋
Examples (粵典–words.hk)
  1. Cantonese
    过度采捕海龟蛋可以导致到海龟绝种。
    過度採捕海龜蛋可以導致到海龜絕種。
    gwo3 dou6 coi2 bou6 hoi2 gwai1 daan2 ho2 ji5 dou6 zi3 dou3 hoi2 gwai1 zyut6 zung2.
    • The over-harvesting of sea turtle eggs can lead to the extinction of sea turtle.
  2. Cantonese
    你正一龟蛋!
    你正一龜蛋!
    • You are such a bastard!