wrack (one's) brain(s)(redirected from you have wracked your brain)
wrack (one's) brain(s)
To struggle very hard to recall or think of something. ("Rack" is considered the more correct spelling, though "wrack" has become acceptable through common usage.) I've been wracking my brain, but I still can't remember what Lydia's husband's name is. He wracked his brains all weekend trying to think of a solution to the problem.
See also: wrack
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
wrack (one's) brains/brain
To try hard to remember or think of something.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.