What Does "she must be up to something" Mean?
Learn what "she must be up to something" means, when people say it, and how to use it naturally in English.
She must be up to something.
It means the speaker suspects there is a hidden plan or motive.
From Never Mess With A Badass Girl, Episode 26
When do people say this?
Scene Context
Someone suspects that another person is secretly planning or hiding something.
Usage Scenario
Use this when you think someone is being secretive or suspicious. It can sound accusatory if said directly to the person.
Better ways to say it
She must be up to something.
I think she's hiding something.
Something's going on.
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