eat one's heart out

Meanings:

• 1.

  generalliteral
  • To eat one's own heart; a literal, archaic, or hyperbolic image of consuming one's heart.

• 2.

  generalidiomaticemotional
  • To suffer overwhelming sorrow, grief, longing, or remorse; to be consumed by intense emotional distress.

• 3.

  generalidiomaticinformalcolloquial
  • Used as a taunt or boast ('eat your heart out'): to invite envy by declaring one's success or superiority.