adjective
- admittedly belonging to a group or party: a card-carrying Communist.
- Often Facetious. dedicated to an ideal, profession, or interest: a card-carrying humanist.
adjective
- being an official member of a specified organizationa card-carrying union member; a card-carrying Communist
1948, used frequently during Cold War in U.S. (typically in reference to official membership in the communist party), from card (n.1) + present participle of carry (v.).