N.A.T.F.
A mean way to say someone is not a real fan, like they're just trying to be cool but they're not even close.
"You're not a fan, you're just here for the hype.", a guy who didn't know the show was on.
"You're not a fan, you're just here to make noise.", a guy who yelled in the group chat but didn't know what was going on.
"You're not a fan, you're just here to post and leave.", a guy who posted one comment and never came back.