don't I know it
idiom
informal
—used to say that one agree with what has just been said
"It's freezing in here!" "Don't I know it."
Cite this Entry
“Don't I know it.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/don%27t%20I%20know%20it. Accessed 31 Oct. 2025.
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