to  upset the apple cart
<abbr style="text-decoration: underline;" title="upset / overturn" > upset</abbr>
ʌpsɛt
apset
the
ðə
dhē
apple
æpəl
āpēl
cart
kɑ:t
kaat

Definition & Meaning of "upset the apple cart"in English

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
Idiom
Informal

What is the origin of the idiom "upset the apple cart" and when to use it?

The idiom "upset the apple cart" originates from the image of a person accidentally or intentionally tipping over a cart filled with apples, creating a mess and disrupting order. It is used to describe an action that causes chaos, disruption, or ruins existing plans, often due to carelessness or a sudden change in circumstances.

Examples
The last-minute venue change upset the apple cart. 
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