Idiom meaning, usage examples, facts

1. There’s no use worrying about a test you didn’t pass. You can’t make it up, so stop crying over spilled milk.
2. When Martin didn’t get the job he wanted so badly, his father gave him good advice. He told him not to cry over spilled milk and that another, equally good job would come his way eventually.

Compare to: eat (one’s) heart out. Whereas cry over spilled milk is to grieve over some event that has happened and cannot be changed, eat one’s heart out is to grieve over an emotional situation that cannot be changed.