laugh up your sleeve
暗中嘲笑或幸灾乐祸
口语·形容暗自窃笑或幸灾乐祸
英文释义
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.
典故来源
源自16世纪，袖子曾用于遮住嘴偷笑，后指暗中嘲笑或幸灾乐祸。