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Jyutping gai1 baai1
Pinyin jī bāi

Definitions (CC-CEDICT)
  1. (Tw) (vulgar) cunt (from Taiwanese 膣屄, Tai-lo pr. [tsi-bai])
  2. (slang) to fuck around with
  3. (used as an intensifier) fucking
  4. fucked up