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

Definition of "off the top of your head" - British English Dictionary

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off the top of your head

from the ​knowledge you have in ​yourmemory: "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)
Translations of “off the top of your head”
in Chinese (Simplified) 凭既有知识, 不假思索地…
in Turkish fazla/hiç düşünmeden, kafadan atarak, rastgele…
in Russian по памяти, без подготовки…
in Chinese (Traditional) 憑既有知識, 不假思索地…
in Polish bez zastanowienia…
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