to upset the apple cart
01
to cause problems, often by ruining or interrupting something that was planned
![to [upset|overturn] the apple cart definition and meaning](https://cdn.langeek.co/photo/46479/original/?type=jpeg "to [upset|overturn] the apple cart definition and meaning")
Idiom
Informal
例子
An industry-backed initiative petition with a large marketing budget overturned the apple cart.
I do n't like upsetting the apple cart, but with all the snow outside I think we should change our plans and not go to the concert this evening.
