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Jyutping ji5 leon2 gik1 sek6
Pinyin yǐ luǎn jí shí

Definitions (Wiktionary)
  1. phrase, idiomatic
    to overestimate one's capabilities or to attack a stronger opponent as the weaker side which is sure to end in failure
    (syn.) 鸡蛋杠石头, 螳臂當車, 雞蛋槓石頭, 以卵投石, 螳臂当车

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Jyutping ji5 leon2 gik1 sek6
Pinyin yǐ luǎn jī shí

Definitions (CC-CEDICT)
  1. lit. to strike a stone with egg (idiom); to attempt the impossible
  2. to invite disaster by overreaching oneself
Definitions (粵典–words.hk)
  1. 動詞
    比喻​以​自己​微弱​嘅​勢​力​去​對​抗​強​大​嘅​敵​人
    to fight a hopeless battle
    • 你同佢呢個大師級鬥,明顯就係以卵擊石。
      你同佢呢个大师级斗,明显就系以卵击石。
      nei5 tung4 keoi5 lei1 go3 daai6 si1 kap1 dau3, ming4 hin2 zau6 hai6 ji5 leon2 gik1 sek6.
      It is obvious that to challenge a master like him is fight a hopeless battle.
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    你同佢呢个大师级斗,明显就系以卵击石。
    你同佢呢個大師級鬥,明顯就係以卵擊石。
    nei5 tung4 keoi5 lei1 go3 daai6 si1 kap1 dau3, ming4 hin2 zau6 hai6 ji5 leon2 gik1 sek6.
    • It is obvious that to challenge a master like him is fight a hopeless battle.