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Jyutping ngaa4 zim1 zeoi2 lei6
Pinyin yá jiān zuǐ lì

Definitions (CC-CANTO)
  1. (slang) (for ability to speak, with a negative connotation) articulate; eloquent; persuasive; sharp-tongued; given to using caustic and trenchant language.
Definitions (粵典–words.hk)
  1. 形容詞
    口才好​勁​,​講​嘢​嗰​陣​咄咄逼人
    fluent and articulate, especially in a sharp-tongued way
    • 個小朋友細細個就牙尖嘴利,問到班嘉賓口窒窒。
      个小朋友细细个就牙尖嘴利,问到班嘉宾口窒窒。
      go3 siu2 pang4 jau5 sai3 sai3 go3 zau6 ngaa4 zim1 zeoi2 lei6, man6 dou3 baan1 gaa1 ban1 hau2 zat6 zat6
      That kid may be young, but he surely has a sharp tongue - even the guests stuttered at his questions.
Definitions (Kaifangcidian)
  1. 尖嘴薄舌
  2. 口齒伶俐 – 口齿伶俐
  3. 能言善辯 – 能言善辩
  4. 伶牙俐嘴
  5. 嘴巴厲害 – 嘴巴厉害
  6. 嘴巴子不肯吃虧 – 嘴巴子不肯吃亏
Examples (粵典–words.hk)
  1. Cantonese
    个小朋友细细个就牙尖嘴利,问到班嘉宾口窒窒。
    個小朋友細細個就牙尖嘴利,問到班嘉賓口窒窒。
    go3 siu2 pang4 jau5 sai3 sai3 go3 zau6 ngaa4 zim1 zeoi2 lei6, man6 dou3 baan1 gaa1 ban1 hau2 zat6 zat6
    • That kid may be young, but he surely has a sharp tongue - even the guests stuttered at his questions.