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Definition of “off the top of your head” - English Dictionary

"off the top of your head" in British English

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off the top of your head

from the knowledge you have in your memory: "What's the capital of Mauritania?" "I don't know off the top of my head, but I could go and look it up."
(Definition of off the top of your head from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Watching the detectorists
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by Colin McIntosh You could be forgiven for thinking that old-fashioned hobbies that don’t involve computers have fallen out of favour. In fact, nothing could be further from the truth. If anything, the internet has made it easier for people with specialist hobbies from different corners of the world to come together to support one another

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