pick brain

pick (one's) brain(s)

To ask one questions in order to obtain detailed information or advice. You should pick John's brain sometime. He knows all about car engines. I've just started playing professionally, and I'd love to pick your brains for any tips you might have.
See also: pick
Farlex Dictionary of Idioms.

pick someone's brain(s)

Fig. to talk with someone to find out information about something. I spent the afternoon with Donna, picking her brain for ideas to use in our celebration. Do you mind if I pick your brains? I need some fresh ideas.
See also: brain, pick
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

pick someone's brain, to

To gather information or ideas from someone who is presumably more expert or more imaginative. This analogy to picking clean a bone or carcass dates from the mid-nineteenth century. “Do you possess the art of picking other people’s brains,” wrote clergyman Benjamin Jowett (1817–93). For picking one’s own brain, see cudgel one’s brains.
See also: pick
The Dictionary of Clichés by Christine Ammer
See also:
  • hit home with (one)
  • (one's) back is up
  • a fly on the wall
  • fly on the wall
  • be over the hills and far away
  • for the ride
  • go along for the ride
  • be/go along for the ride
  • along for the ride
  • along for the ride, to go/to come/just