upset the apple cart
打翻了苹果车；破坏了原本正常的情况或计划
口语·形容打乱原有安排
英文释义
to disrupt or spoil a plan or situation
例句
His sudden resignation really upset the apple cart for the project.
典故来源
源自马车运苹果时翻车会打乱一切，比喻破坏计划或秩序。