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Jyutping daai6 se4 o1 si2
Pinyin dà shé ē shǐ

Definitions (粵典–words.hk)
  1. 語句
    見​ ​大蛇​屙​尿
    literally: big snake shits; see 大蛇屙尿
  2. 近義詞
    大蛇痾尿
  3. 參看
    大蛇痾屎
Definitions (Wiktionary)
  1. phrase, Cantonese, Hakka, figuratively, idiomatic
    very rare things or phenomena
    • 未见过大蛇屙屎
      未见过大蛇屙屎
      mei6 gin3 gwo3 daai6 se4 o1 si2
      never having seen big things before (and therefore considering a normal thing remarkable due to ignorance)

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Jyutping daai6 se4 o1 si2
Pinyin dà shé ā shǐ

Definitions (CC-CANTO)
  1. it's a vulgar expression, meaning a big deal
Examples (Wiktionary)
  1. Cantonese
    未见过大蛇屙屎
    未见过大蛇屙屎
    mei6 gin3 gwo3 daai6 se4 o1 si2
    • never having seen big things before (and therefore considering a normal thing remarkable due to ignorance)