weep (one's) heart out(redirected from weep their hearts out)
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weep (one's) heart out
To weep copiously; to cry intensely and for a long time. Lauren wept her heart out at the news of her father's sudden death. What did you say to upset your brother? He's been weeping his heart out upstairs for the last half hour!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.