turn something on its head
彻底颠覆或改变某事物的观点、理论或情况
书面·学术或讨论中强调颠覆性改变
英文释义
to completely reverse or change something
例句
The new theory turns the old one on its head and changes everything we thought we knew.
典故来源
源于物理动作，将物体上下颠倒，比喻彻底推翻原有观点或理论。