don't I know it

idiom

Definition of don't I know it

informal
used to say that one agree with what has just been said"It's freezing in here!" "Don't I know it."

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“Don't I know it.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/don%27t%20I%20know%20it. Accessed 14 Aug. 2020.

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