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eat one's heart out

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Feel bitter anguish, grief, worry, jealousy, or another strong negative emotion. For example, She is still eating her heart out over being fired, or Eat your heart out—my new car is being delivered today. This hyperbolic expression alludes to strong feelings gnawing at one's heart. [Late 1500s]

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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.

How to use eat one's heart out in a sentence

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