1. a zealous group of fans of a celebrity, esp. musical artists.
2. one or more annoying persons who are fixated on another person and follow them and pretend to be their best friend.
1. I'm going to my Celine Dion fanclub meetup before her show, and it will be awesome!
2. Guy1: Who's your fanclub?
Guy2: Oh, that's Hans and Andrew. They follow me everywhere.
Guy1: Dude, that sucks!