Anyone who uses the reputation of an organization they belong to in order to
try to further their career/social advancement, and use it as a pedestal to look down on others who
aren't a member of said organization. Instead of carrying the values of the organization, they attempt to let the values of the organization
carry them, usually to their detriment.
Tom is a card-carrying member of his fraternity. He feels that wearing his letters gives him an excuse to be an
asshole to everyone who'
s not one of his brothers, and assumes that his connections will get him a job after
college, even though he drinks and jacks off all day and never goes to class.
Susan is a card-carrying member of PETA. Her entire identity is built around the ideals of
one organization. She is not imaginative enough to develop a personality of her own, so instead she adopts the angry bleeding-heart liberal stereotype.