rack your brain

Examples (10)

• We racked our brains but we couldn't come up with a solution.
• I've been racking my brain all day trying to remember her name.
• You'll have to rack your brain to solve this difficult puzzle.
• Rack your brain and think! Where did you last see the keys?
• The detective racked his brain for any clue he might have missed.
• She sat there, racking her brain, hoping for a moment of inspiration.
• There's no need to rack your brain over it; the answer is in the back of the book.
• Have you been racking your brain wondering what to get him for his birthday?
• The engineers racked their brains to find a way to fix the engine failure.
• He racked his brain for hours, but the memory just wouldn't come back.