I don't know about that
idiom
—used to express doubt about something
"She said she'd be here by 5:00." "I don't know about that."
Cite this Entry
“I don't know about that.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/I%20don%27t%20know%20about%20that. Accessed 1 Dec. 2025.
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Merriam-Webster unabridged
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