Fine China - Rock Can't Last Forever lyrics

So I heard you got a punk band What's so punk about that? And so I heard that you got lots of songs Well, friend, nobody cares about that And everybody needs to learn to get over it, and everybody needs to learn Rock can't last forever It's just a faad, don't ever try and make it your life I listened to the tapes you gave me And I honestly tried not to laugh And now you say that I'm a meanie Tell me, what's so mean about that?