To "pick someone's brains" means to ask someone for advice, information, or ideas on a particular topic.
For example:
- "I'd love to pick your brains about the best approach to solving this complex problem."
- "Can I have a quick meeting to pick your brains on the latest industry trends?"
Similar expressions include "get someone's opinion," "seek someone's expertise," or "tap into someone's knowledge." These phrases all convey the idea of gathering valuable insights from someone.