The stage of life one goes through when their musical taste becomes much more elaborate and meaningful. May start with an interest in Fall Out Boy and the All American Rejects and eventually turn into an interest in The Beatles, Led Zeppelin, or AC/DC.
Jim - Is it just me or is Dirty Little Secret starting to sound like absolute garbage?! What's wrong with me!
John - Oh my goodness....Jim, you're going through Musical Puberty! *wipes tear from cheek*