Definition of pick someone's brains or brain in English:

pick someone's brains (or brain)

informal Obtain information by questioning someone who is better informed about a subject than oneself: mind if I pick your brain for a minute?
More example sentences
  • He knew the business side so I picked his brain on that subject.
  • They send us questionnaires to pick our brains.
  • The quiz master joined us and we tried to pick his brain about where he gets his questions from.
See parent entry: pick

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Word of the day animalcule
Pronunciation: ˌanɪˈmalkjuːl
noun
a microscopic animal