CRY OVER SPILT MILK

{v. phr.}, {informal} To cry or complain about something that has already happened; be unhappy about something that cannot be helped. * /After the baby tore up Sue's picture book, Sue's mother told her there was no use crying over spilled milk./ * /You have lost the game but don't cry over spilt milk./ Compare: MAKE ONE'S BED AND LIE IN IT, WATER OVER THE DAM or WATER UNDER THE BRIDGE.