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Jyutping gwai2 sik6 nai4
Pinyin guǐ shí ní

Definitions (CC-CANTO)
  1. gabble / mumble / murmur, describes the way one talks which makes it hard for others to comprehend
Definitions (粵典–words.hk)
  1. 動詞
    講​嘢​含糊不清
    to slur your words; literally: ghost eats mud
    • 唔該講清楚啲得唔得?咪鬼食泥噉啦。
      唔该讲清楚啲得唔得?咪鬼食泥噉啦。
      m4 goi1 gong2 cing1 co2 di1 dak1 m4 dak1? mai5 gwai2 sik6 nai4 gam2 laa1.
      Could you please say it more clearly? Don't slur your words.
Definitions (Wiktionary)
  1. adv, Cantonese
    to have slurred speech; to be unable to speak clearly
    (syn.) 口齒不清, 口齿不清
    • 佢讲嘢鬼食泥噉。
      佢讲嘢鬼食泥噉。
      keoi5 gong2 je5 gwai2 sik6 nai4 gam2.
      His speech is slurred.
Definitions (Kaifangcidian)
  1. 不清不楚
Examples (粵典–words.hk)
  1. Cantonese
    唔该讲清楚啲得唔得?咪鬼食泥噉啦。
    唔該講清楚啲得唔得?咪鬼食泥噉啦。
    m4 goi1 gong2 cing1 co2 di1 dak1 m4 dak1? mai5 gwai2 sik6 nai4 gam2 laa1.
    • Could you please say it more clearly? Don't slur your words.
Examples (Wiktionary)
  1. Cantonese
    佢讲嘢鬼食泥噉。
    佢讲嘢鬼食泥噉。
    keoi5 gong2 je5 gwai2 sik6 nai4 gam2.
    • His speech is slurred.