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Definition of no kidding
informal
1 —used to emphasize the truth of a statementNo kidding, the test is tomorrow.
2 —used to ask if a statement is really true"The test is tomorrow." "No kidding?"
3 —used to show surprise or interest in what has been said"My brother got engaged last month." "No kidding! That's great news!" —often used in an ironic way in response to a statement that is regarded as very obvious"If we don't start going faster, we're not going to finish on time." "Gee, no kidding."
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