beat one's brains out


Make a great mental effort to understand, solve, or remember something, as in Joe's beating his brains out to finish this puzzle. Christopher Marlowe used this hyperbolic idiom in The Massacre of Paris (1593): “Guise beats his brains to catch us in his trap.” Also see rack one's brains.

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Question 1 of 9
You may have read the word "simmer" in a recipe or two, but what does it really mean?

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.