DEMON

[noun] [C] - an evil spiritThey believed that the rabbi would be able to exorcise/drive out the demons that were possessing her.I don't know what kind of demon got into me that made me be so unkind.(figurative) James is a real little demon (= he behaves very badly).(figurative) Ellen works like a demon/is a demon worker/is a demon for work (= works very hard).(figurative) Stefan has a demon serve (= he hits the ball in tennis very powerfully).(UK humorous) It was the demon drink (US humorous demon alcohol) (= too much alcohol) that made me behave as I did.