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Jyutping baa2 gwai2
Pinyin bǎ guǐ

Definitions (CC-CANTO)
  1. (slang) an expression to say that something is useless; futile; pointless; meaningless
Definitions (粵典–words.hk)
  1. 語句
    冇​用​,​要​嚟​都​冇​幫助​,​有​時會用​嚟​引伸​指一​啲​嘢​質素​低​。
    useless, sometimes used as a comment on the low quality of something
    • 哎,把鬼呀!
      哎,把鬼呀!
      aai2, baa2 gwai2 aa4!
      Agh, what a bad one this is!
  2. 語句
    加​「​把​鬼​咩​?​」​喺​一​個​動​作​短句​嘅​後​面​,​以反​詰​形式​指出​個動作​冇​用​。
    adding the expression "把鬼咩?" (baa2 gwai2 me1, always said with falling intonation) after a verb phrase, used as a rhetorical question to mean there is no use in doing something.
    • 呢度得我哋兩個,要咁多張櫈把鬼咩?
      呢度得我哋两个,要咁多张櫈把鬼咩?
      ni1 dou6 dak1 ngo5 dei6 loeng5 go3, jiu3 gam3 do1 zoeng1 dang3 baa2 gwai2 me1?
      Just the two of us are here; what's the use of having so many chairs?
  3. 近義詞
    替死
Definitions (Wiktionary)
  1. verb, Cantonese
    used to express something is useless
    • 呢课都唔考,读嚟把鬼!
      呢课都唔考,读嚟把鬼!
      nei1 fo3 dou1 m4 haau2, duk6 lai4 baa2 gwai2!
      There will not be any questions on this chapter in the exam. What's the point of studying this chapter?
Definitions (Kaifangcidian)
  1. 有什麼用 – 有什么用
  2. 頂什麼用 – 顶什么用
  3. 白費勁 – 白费劲
  4. 毫無用處 – 毫无用处
Examples (粵典–words.hk)
  1. Cantonese
    哎,把鬼呀!
    哎,把鬼呀!
    aai2, baa2 gwai2 aa4!
    • Agh, what a bad one this is!
  2. Cantonese
    呢度得我哋两个,要咁多张櫈把鬼咩?
    呢度得我哋兩個,要咁多張櫈把鬼咩?
    ni1 dou6 dak1 ngo5 dei6 loeng5 go3, jiu3 gam3 do1 zoeng1 dang3 baa2 gwai2 me1?
    • Just the two of us are here; what's the use of having so many chairs?
Examples (Wiktionary)
  1. Cantonese
    呢课都唔考,读嚟把鬼!
    呢课都唔考,读嚟把鬼!
    nei1 fo3 dou1 m4 haau2, duk6 lai4 baa2 gwai2!
    • There will not be any questions on this chapter in the exam. What's the point of studying this chapter?