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Jyutping gong2 zau6 tin1 haa6 mou4 dik6
Pinyin jiǎng jiù tiān xià wú dí

Definitions (粵典–words.hk)
  1. 語句、俚語
    指責​其他人​空有​其言​,​得​把​口​;​全句​係​「​講就​天下​無敵​,​做​就​無能​為力​」​或者​「​講就​天下​無敵​,​做​就​有心​無力​」
    incapable of accomplishing what one says; literally: being the greatest in the world when talking
    • 唓,佢講就天下無敵,預咗佢冇料到㗎啦。
      𪠳,佢讲就天下无敌,预咗佢冇料到㗎啦。
      ce1, keoi5 gong2 zau6 tin1 haa6 mou4 dik6, jyu6 zo2 keoi5 mou5 liu2 dou3 gaa3 laa1.
      Pfft, he makes empty talk only. I don't expect that he is capable to do so.
  2. 近義詞
    講就凶狠
Examples (粵典–words.hk)
  1. Cantonese
    讲就天下无敌,做就无能为力
    講就天下無敵,做就無能為力
    gong2 zau6 tin1 haa6 mou4 dik6, zou6 zau6 mou4 nang4 wai4 lik6
    • literally, when talking, the greatest in the world, when doing, there's no way to help
  2. Cantonese
    𪠳,佢讲就天下无敌,预咗佢冇料到㗎啦。
    唓,佢講就天下無敵,預咗佢冇料到㗎啦。
    ce1, keoi5 gong2 zau6 tin1 haa6 mou4 dik6, jyu6 zo2 keoi5 mou5 liu2 dou3 gaa3 laa1.
    • Pfft, he makes empty talk only. I don't expect that he is capable to do so.