Spoil a plan or disturb the status quo.
More example sentences
- And, because I'm a contrarian at heart, I'll root for perverse storylines that will upset the apple cart and disturb the powers that be.
- They were breaking with the status quo, upsetting the apple cart, taking part in a 60s style rebellion against the establishment.
- Once upon a time, books were meant to upset the apple cart, to make politicians nervous, threaten the status quo, shake up our expectations, make us question things anew.
Definition of upset the apple cart in:
- The US English dictionary