mine run is an adjective meaning "not special in any way; lacking distinction". It carries one recorded sense.
not special in any way; lacking distinction
“run-of-the-mill boxing”
“your run-of-the-mine college graduate”
“a unexceptional an incident as can be found in a lawyer's career”
Definitions, synonyms and semantic relations for mine run come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.