Etymology

pi sai

Today it means: Hardened snot, booger. Full definition →

Hokkien 鼻屎 ← Teochew 鼻屎
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The story

  1. Teochew · borrowed from鼻屎
  2. Hokkien · borrowed from鼻屎
  3. English todaypi sai

From either or both Hokkien 鼻屎 (phīⁿ-sái) and Teochew 鼻屎 (pin⁷ sai²).

Etymology from Wiktionary, CC BY-SA 4.0.