what do you know

idiom

Definition of what do you know

informal
used to express surpriseShe's an astronaut? Well, what do you know!"He's going to law school in the fall." "Well what do you know about that?!"

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“What do you know.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/what%20do%20you%20know. Accessed 22 Oct. 2020.

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