cry over spilled milk

US /kraɪ ˈoʊvər spɪld mɪlk/
UK /kraɪ ˈoʊvər spɪld mɪlk/
"cry over spilled milk" picture
1.

to be unhappy about something that cannot be changed

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It's no use crying over spilled milk; we just need to find a solution now.
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She was still crying over spilled milk from last week's mistake.
:
spill overspillcrymilkspill out(the) thrills and spillsspill the beans