乱点鸳鸯luàn diǎn yuān yāng

鸳鸯：常用以比喻夫妻。指几对夫妇互相错配。后指不顾具体情况而乱搭配。

例今日听在下说一桩意外婚姻的故事，唤作《乔太守乱点鸳鸯》。——明·冯梦龙《醒世恒言》

英discriminately appoint affectionate couple; to cause an exchange of partners by mistake between two couples engaged to marry;