off the top of one's head
phrase
: in an impromptu manner
… sat down and wrote the … story off the top of his head.—
Jerome Beatty, Jr.
Jerome Beatty, Jr.Cite this Entry
“Off the top of one's head.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/off%20the%20top%20of%20one%27s%20head. Accessed 11 Dec. 2025.
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Merriam-Webster unabridged
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