Definition
Used to express that someone is criticizing another person for a fault they themselves possess; often used in a sarcastic manner.
你也不是一樣！
"You're always late!" he said angrily. "Oh, look who's talking! You're often late yourself, aren't you?"
「你總是遲到！」他生氣地說。「哦，看看誰在說話！你自己不也常常遲到嗎？」
When she criticized him for being wasteful, he laughed, "Look who's talking! You just bought a bunch of unnecessary things yesterday."
當她批評他浪費時，他笑著說：「看看誰在說話！你昨天不是才買了一堆不必要的東西嗎？」
"You should exercise more," he said. "Look who's talking! When was the last time you exercised?"
「你應該多運動，」他說。「看看誰在說話！你上次運動是什麼時候？」