Definition of off the top of one's head in US English:

off the top of one's head

phrase

  • Without careful thought or investigation.

    • ‘I thought you just remembered it off the top of your head.’
    • ‘Someone's gathered a whole list of rain songs, but before you look, which ones can you think off the top of your head?’
    • ‘I'd like to see you come up with something better, right there off the top of your head.’
    • ‘He gives a very polished, professional performance with excellent comic timing to make the jokes appear impromptu and off the top of his head.’
    • ‘How many words for marijuana, or for smoking it, can you think of on the spot, right off the top of your head?’
    • ‘There are differences in the economic and social policies advocated by the two parties, but I bet you can't mention a major one off the top of your head.’
    • ‘And that's just off the top of my head; I may have the dates wrong.’
    • ‘One little girl, only seven years of age, stood at the top of the classroom one day and told a story off the top of her head, capturing the attention of the entire class for twenty minutes.’
    • ‘And can you really divide $15.03 by two off the top of your head?’
    • ‘We will receive a sheet of paper with one of a number of topical issues printed on it and then have to speak for two minutes off the top of our head.’
    impromptu, spontaneous, unscripted, ad lib
    spontaneously, extemporaneously, ad lib
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