card-carrying
adjective
card-car·ry·ing ˈkärd-ˌker-ē-iŋ 
-ˌka-rē-iŋ
1
: being a full-fledged member of an organization (such as a Communist party)
2
a
: strongly identified with a group (as of people with a common interest)
card-carrying members of the ecology movement
R. J. Neuhaus
R. J. Neuhaus b
: being such emphatically or unmistakably
a card-carrying hippie
Word History
Etymology
from the assumption that such a person carries an identification card
First Known Use
1911, in the meaning defined at sense 1