Meaning of the word "upset the apple cart" in English

What does "upset the apple cart" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

upset the apple cart

US /ʌpˈsɛt ði ˈæpl kɑrt/
UK /ʌpˈsɛt ði ˈæpl kɑrt/
"upset the apple cart" picture

Idiom

1.

to spoil a plan or arrangement

Example:
He didn't want to upset the apple cart by bringing up his concerns during the meeting.
Her sudden resignation really upset the apple cart for the whole department.
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