rack your brains

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rack (one's) brain(s)

To struggle to recall or think of something. I've been racking my brain, but I still can't remember what Lydia's husband's name is. He racked his brains all weekend trying to think of a solution to the problem.
See also: rack

rack your brains


rack your brain

COMMON If you rack your brains or rack your brain, you think very hard about something or try very hard to remember it. She racked her brains but could not remember enough to satisfy the clerk. They asked me for fresh ideas, but I had none. I racked my brain, but couldn't come up with anything. Note: The old-fashioned spelling wrack is occasionally used instead of rack in this expression. Bob was wracking his brain, trying to think where he had seen the drivers before. Note: You can refer to this activity as brain-racking. All your brain-racking is making absolutely no contribution to the world.
See also: brain, rack

rack your brains (or brain)

make a great effort to think of or remember something.
A rack was a medieval instrument of torture consisting of a frame on which a victim was stretched by turning rollers to which their wrists and ankles were tied. To rack someone was to torture them on this device and the image in this idiom is of subjecting one's brains to a similar ordeal in the effort to remember something.
1998 Spectator If I rack my brains for something nice to say about our weather, I suppose it does at least enable us to grow better grass than they do in California.
See also: brain, rack

rack your ˈbrains

(also wrack your ˈbrains less frequent) (informal) try very hard to think of something or remember something: I’ve been racking my brains all day trying to remember his name.
See also: brain, rack
References in periodicals archive ?
No need to break the bank or rack your brain on how to make a typically red Valentine setting that isn't tacky.
I'm not sure if it was always thus, but these days University Challenge is not content with merely making you rack your brain for information.
And aren't you glad you don't have to rack your brain over picking out the perfect holiday gift for him?
Talking about the Big Dig, and all I've read I thought it was all about a councilor who was punched in the head Cos when you think about it and really rack your brain At the end of the day it's councillors who really are to blame So they moan away on such huge pay So what can I say?
For the chance to win rack your brain and answer this following question: Name six golfers with a z in their name who have won one of golf's Majors.
You rack your brain, stumble for the words, seek the sentiments to explain your shuddering shift in loyalty, your sudden change of heart.
The tricksy puzzles will populate your thoughts at all hours, as you rack your brains for visual clues in the environment and remind yourself of what you learned from earlier challenges.
Considering this is a matter of public safety that this dog is still at large, I suggest you rack your brains and see what information you can provide to where the dog is now.
uk, click on the link to win Take That tickets and rack your brains for the answer to this: In 1995, which member of Take That left to start a solo career?
YOU don't need to rack your brains with this amazing offer - a massive 50 PER CENT off three great puzzle books.
IF you've spent more time in front of the television than you're willing to admit, then why not rack your brains in this online TV trivia teaser.