Christian rock band whose name parodies real band AC/DC, from the "Sex, Pies and Idiot Scrapes" episode (September 28, 2008) of The Simpsons. Their song "Kindly Deeds Done For Free" parodies AC/DC's "Dirty Deeds Done Dirt Cheap."
A.D. is an abbreviation for the Latin "anno Domini nostri Jesu Christi", which translates to "in the year of our Lord Jesus Christ". B.C. stands for "before Christ."