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what's the big deal?

idiom

—used to ask why something is so important
So I'm late. What's the big deal?

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what's that supposed to mean
what's the big deal?
what's the big idea
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“What's the big deal?.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/what%27s%20the%20big%20deal%3F. Accessed 1 Dec. 2025.

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Last Updated: - Definition revised
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