Meaning of the word "says who?" in English

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

says who?

US /ˈsɛz huː/
UK /ˈsɛz huː/
"says who?" picture

Idiom

1.

used to express doubt or disagreement with a statement, implying that the source of the information is questionable or lacks authority

Example:
You can't do that. Says who?
They told me I'm not allowed to enter. Says who?
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