From Longman Dictionary of Contemporary Englishcamp followerˈcamp ˌfollower noun [countable] especially British EnglishSUPPORT A PERSON, GROUP, OR PLAN someone who supports an organization or a political party, but who is not actually a member of it
Examples from the Corpus
camp follower• Whether neighbour, camp follower or convenient snack, the wolves changed little as their owners were transformed. 