Someone that is so insanely fanatical about something that they can't even go a couple hours without bringing their obsession up or referencing it. (sometimes said individual is extremely deluded and mistakes their fantasy for reality)
student1: Can you believe Zach in gym today?
student2: He's such a fanaddict that he went into totalHunger Games
mode during dodge ball
student1: Yeah, and then he was mumbling something
about being back in District 12
Student2: All of his essays are on the Hunger
Games. Even his Junior Thesis. He's gonna
have to repeat English.