ˈ ̷ ̷| ̷ ̷ ̷ ̷ adjective
Etymology: so called from the contrast of the typically blue collars of work shirts to the typically white collars of dress shirts
: belonging or relating to a broad class of wage earners whose duties call for the wearing of work clothes or protective clothing
warehousemen, longshoremen, farmers, miners, mechanics, construction workers, and other blue-collar workers — W.J.Hudson
— compare white-collar