eat one's heart out

Disputed. Three schools of thought exist:

• From "This will eat your heart out.", suggesting that the recipient of the taunt will have their heart, the core of their being, eaten out with desire, bitterness, or pain.
• From the 16th century "to eat one's own heart" (to suffer in silence from anguish or grief), possibly from the Bible "to eat one's own flesh" (to be lazy). The phrase "to eat one's heart out" appears as a formulaic phrase in the Iliad, meaning to experience extreme grief. (For instance, Iliad.24.128, and many other locations.)
• When used as the taunt "Eat your heart out, [someone]!" a suggestion that the recipient of the taunt "eat up" as much as they like. Figuratively more akin to "experience me besting you."

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eat one's heart out (third-person singular simple present eats one's heart out, present participle eating one's heart out, simple past ate one's heart out, past participle eaten one's heart out)

1. (idiomatic) To feel overwhelming sorrow, jealousy, or longing; to grieve.

   The Brazilians are eating their hearts out over their defeat by Germany in the World Cup.

   Eat your heart out, pal! We won the title!

• Phrases, Clichés, Expressions, & Sayings, accessed on 2005-04-05
• Origin of Phrases, accessed on 2005-04-05