laugh up your sleeve
暗中嘲笑或幸災樂禍
口語·形容暗自竊笑或幸災樂禍
英文釋義
to secretly find amusement or satisfaction in someone else's misfortune
例句
She pretended to be nice, but I knew she was laughing up her sleeve.
典故來源
源自16世紀，袖子曾用于遮住嘴偷笑，后指暗中嘲笑或幸災樂禍。