pinko UK /ˈpɪŋkəʊ/US /ˈpɪŋkoʊ/ noun1 •(informal, disapproving) A socialist, particularly one who is not completely communist.Kelly reassures his readers that the people who run this emerging economy are not left-wing in any traditional sense. They are “more likely to be libertarians than commie pinkos,” he explains. — 2014 formspinkoes · pinkos