pinko

noun, plural pink·os, pink·oes.

1. a person with left-wing, but not extreme, political opinions.
2. a person who leans toward communist ideology.

adjective

3. pink1(def 10).

noun plural -os or -oes mainly US derogatory

1. a person regarded as mildly left-wing

n.1936, derogatory slang form of pink (n.), used of people whose social or political views “have a tendency toward ‘red;’ ” a metaphor that had existed since at least 1837. As an adjective by 1957.