Cách sử dụng
The expression "upset the apple cart" means to cause trouble or upset a situation. It comes from the idea of someone accidentally knocking over a cart filled with apples, causing chaos and frustration. For example, if someone is working on a project and another person comes in and changes everything last minute, they could be said to have "upset the apple cart" because they caused confusion and made things more difficult. It can also be used to describe situations where things weren't going smoothly and someone made things worse.