From Longman Dictionary of Contemporary Englishrun-of-the-millˌrun-of-the-ˈmill adjective ORDINARYnot special or interesting in any way SYN ordinary a run-of-the-mill performance
Examples from the Corpus
run-of-the-mill• There is still scope therefore for the artist, but no longer for the run-of-the-mill artist, in scientific illustration.• Detective Harris could see this was not going to be a run-of-the-mill case.• The company is out telling run-of-the-mill customers not to expect any real deliveries until at least October.• Products such as highly-priced porcelain will be subject to far higher quality controls than run-of-the-mill household earthenware.• A design on this sort of scale would be worth ten times the run-of-the-mill jobs she had completed just recently.• And that's for run-of-the-mill managers.• Nothing very average or run-of-the-mill or mediocre about that, now is there?• Ordinary run-of-the-mill players are built up into footballing geniuses.• Science popularisers often make the same claim, dismissing the Sun as just a run-of-the-mill star. 