From Longman Dictionary of Contemporary Englishgo through the millgo through the millPROBLEMto go through a time when you experience a lot of difficulties and problems He’s really been through the mill recently. → mill
Examples from the Corpus
go through the mill• Busiack has been through the mill with these federal investigators.• Part of the Council's records-base is going through the mill of privatisation.• We went through the mill together, Franklin. 