If you've seen the movie Clerks, you know who Fuck Your Yankee Blue Jeans are. They are the band of Silent Bob's Russian cousin Olaf. You can hear their song "Berserker" here:
http://www.mrniel.com/berzerker.mp3
Here is the Berzerker shirt:
http://www.mrniel.com/berzerker.mp3
Here is the Berzerker shirt: