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Jyutping hau2 seoi1
Pinyin kǒu shuāi

Definitions (CC-CANTO)
  1. describe someone who always says the wrong things inappropriately [colloquial]
Definitions (粵典–words.hk)
  1. 形容詞、俚語
    形容​人成​日​講錯​嘢​,​惹人​反感
    to describe a person that keeps saying the wrong thing at a wrong time; literally: mouth bad
    • 你個人咁口衰,梗係容易得罪人啦。
      你个人咁口衰,梗系容易得罪人啦。
      Your words are so hurtful, no wonder you get on others' nerves all the time.
Examples (粵典–words.hk)
  1. Cantonese
    你个人咁口衰,梗系容易得罪人啦。
    你個人咁口衰,梗係容易得罪人啦。
    • Your words are so hurtful, no wonder you get on others' nerves all the time.