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off the top of one's head
Definition from Dictionary, a free dictionary
The only reason they come to see me is that I know that life is great—and they know I know it.Clark Gable
Adverboff the top of one's head (not comparable)
- (idiomatic) (of something known, thought of, or remembered) Without great thought or investigation; extemporaneous; natural; offhand.
- I cannot think of any good examples off the top of my head, but give me a couple of hours and I'm sure I could come up with something.
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