pick someone's brain

Idioms  

1. Obtain ideas or information from another person, as in I'm out of ideas for decorating—let me pick your brain. This term alludes to picking clean a carcass. [Mid-1800s]

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Example Sentences

Dorie Clark, adjunct professor at Duke University’s Fuqua School of Business and the author of “Entrepreneurial You,” said asking to pick someone’s brain has become overused to the point of thoughtlessness.

From New York Times

The Ask – Nebulous requests to, “pick someone’s brain,” are seldom welcomed by busy professionals.

From Forbes