群魔乱舞 qúnmó-luànwǔ

[pandemonium;evil spirits of all kinds dance in a riotous revelry a host of demons dancing in riotous revelry—rogues of all kinds running wild] 比喻许多坏人猖狂活动

亦作“群魔乱舞”。谓众恶徒为非作歹，肆无忌惮。如：清平世界，那容得群魔乱舞。