From Longman Dictionary of Contemporary Englishcard-carryingˈcard-ˌcarrying adjective [only before noun] 1 → card-carrying member2 believing very strongly in something – used to show disapproval One of them is a card-carrying ecology freak.
Examples from the Corpus
card-carrying• And Magruder really was a card-carrying bicycle freak who had even ridden his 10-speed to the White House every day.• For twenty-two years he was a card-carrying Communist, an activist in the cadre of the party.• George Spachtholz has been a proud, card-carrying member of the Loyal Order of the Moose for 45 years.• As a card-carrying member of the Wilderness Society, I do not advocate less pristine forest.• How many of the extra women on the list are card-carrying members of the Conservative party? 