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Jyutping bat1 ham1 jat1 gik1
Pinyin bù kān yī jí

Definitions (Wiktionary)
  1. phrase, idiomatic
    cannot withstand a single blow; collapse at the first blow

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Jyutping bat1 ham1 jat1 gik1
Pinyin bù kān yī jī

Definitions (CC-CEDICT)
  1. to be unable to withstand a single blow
  2. to collapse at the first blow
Definitions (粵典–words.hk)
  1. 形容詞
    殘弱​到​一個​地步​,​一​嘢​就​可以​打巢
    so weak that it only takes one strike to destroy
    • 巴西冇咗尼馬,雷斯又成日走上去,後方自然不堪一擊。
      巴西冇咗尼马,雷斯又成日走上去,后方自然不堪一击。
      Brazil lost Neymar, and Luiz goes to the front all the time, of course their defence is terribly fragile.
Definitions (Wiktionary)
  1. phrase, idiomatic
    cannot withstand a single blow; collapse at the first blow
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    巴西冇咗尼马,雷斯又成日走上去,后方自然不堪一击。
    巴西冇咗尼馬,雷斯又成日走上去,後方自然不堪一擊。
    • Brazil lost Neymar, and Luiz goes to the front all the time, of course their defence is terribly fragile.
  2. Cantonese
    不堪一击
    不堪一擊
    bat1 ham1 jat1 gik1
    • cannot even take a single blow
Examples (Wiktionary)
  1. Mandarin
    不堪一击
    不堪一擊
    bù kān yī jī
    • cannot withstand a single blow