Peak Album Preacher

When someone listens to the most popular album by a band, so he/she thinks they are a fan and tell everyone that the band is the greatest.

Adam: OMG just listened to Nevermind by Nirvana. They are the best band everrr I'm gonna call everyone and tell them to download this.

Me: Dont listen to Adam, he's just a peak album preacher, he's never heard any of Nirvanas old stuff.