乱点鸳鸯　

◎ 乱点鸳鸯 luàndiǎn-yuānyāng

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

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》