As a perjorative adjective, implies that someone behaves worse than another who is not card-carrying; i.e. a card-carrying --- is worse than a normal ---, and is possibly drawn to others of his kind.
He's a card-carrying douchebag.
by Marhenhuh March 21, 2010

Two or more people, usually young and female, sharing two or more attributes, one of which must be ditziness.
by Marhenhuh March 21, 2010
