From Longman Dictionary of Contemporary Englishblue-collarˌblue-ˈcollar adjective [only before noun] BEWORKERblue-collar workers do physical work, rather than working in offices → white-collar, pink-collar
Examples from the Corpus
blue-collar• Lately, the restaurant chain, which caters mainly to blue-collar diners, has been hurt by competition.• His ability to deliver the C2 blue-collar, Essex-man vote has, arguably, won them the last two general elections.• Aside from its cast, the show was lauded for its honest and realistic depiction of blue-collar family life.• Always a blue-collar town, Gary developed into a mighty industrial force on the strength of the nearby lakefront steel mills.• The school serves a community of approximately 10,000 people, mostly blue-collar workers who are employed by the pickle plant.• His political support comes mainly from blue-collar workers.From Longman Business Dictionaryblue-collarˌblue-ˈcollar adjective [only before a noun] HUMAN RESOURCESblue-collar work is unskilled work that may be hard and dirtythe loss of a lot of blue-collar jobs in the docksa strike by blue-collar workers → compare white-collar 