someone who slavishly follows and sucks up to a celebrity. A fan to excessive degree. Usually applied to one who makes people uncomfortable by their adoration.
That guy is such a gherm. He buys every piece of merchandise related to that singer and attends every show.
A person not affiliated with the music industry but who has connections that can get them backstage concert access. They then get backstage and totally get in the way of those who are supposed to be there working. Term originated at Starwood Amphitheater in Antioch, TN during the summer of 1990.
Wow, this load-out would be a breeze but the gherms at this Jimmy Buffet show are totally getting in the way!