the biter bit
自食其果的人，也就是瞧不起別人的人被別人嘲笑或欺負了
書面/口語·描述因果報應
英文釋義
to see someone get a taste of their own medicine or experience a negative consequence as a result of their own actions
例句
He tricked his friend, but later got tricked himself—the biter bit.
典故來源
源自伊索寓言或民間故事，指咬人者反被咬，比喻害人者終自食其果。