card-carrying

card-car.ry.ing

adj.（形容词）
Being an enrolled member of a particular organization:
正式成员的：成为一特定组织的注册成员的：
例句：
a card-carrying Communist.
一名正式共产党员

Avidly devoted to a group or cause:
地地道道的：迫切地献身于一个群体或致力于一个事业的：
例句：
card-carrying fitness enthusiasts.
热衷于增强体质的人

来源：
[From the assumption that such a person carries a membership card]
[源自臆断一个人持有会员证]