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Jyutping zing1 saang1 gwaa1
Pinyin zhēng shēng guā

Definitions (CC-CANTO)
  1. (noun) a female who is not mature enough and not elegant enough; (adjective) slow witted
Definitions (粵典–words.hk)
  1. 語句
    歇後語​─​─​侲​侲​哋​。​指人​唔​熟性​、​大​唔​透​、​低能​。
    sandwich pun of which the latter part is "feel crispy and raw," which means someone's behavior is immature, childish or silly; literally: a raw gourd not steamed well
    • 佢咁大個人仲係蒸生瓜咁樣。
      佢咁大个人仲系蒸生瓜咁样。
      keoi5 gam3 daai6 go3 jan4 zung6 hai6 zing1 saang1 gwaa1 gam2 joeng2.
      He is still immature and silly for his age.
Examples (粵典–words.hk)
  1. Cantonese
    蒸生瓜 - 侲侲哋
    蒸生瓜 - 侲侲哋
    yue:蒸生瓜 - 侲侲哋
    • a raw gourd not steamed well - an immature and silly guy
  2. Cantonese
    佢咁大个人仲系蒸生瓜咁样。
    佢咁大個人仲係蒸生瓜咁樣。
    keoi5 gam3 daai6 go3 jan4 zung6 hai6 zing1 saang1 gwaa1 gam2 joeng2.
    • He is still immature and silly for his age.