The "Georgia Magnet": A Statce to Mr. H. W. Schneider at Barrow. The Manchester Guardian. November 23, 1891. Page 8. Viewed in ProQuest Historical Newspapers.
From the root "peter," refering to the show's main character.
Kevin: Dude, shut up. That's such an old "Family Guy."
Joe (to self): Damn, petered out again...