John Mayer RIPPED By Shooter Jennings -- You're a Total 'Douche'

John Mayer is a douchebag ... in fact, he's "King Douche" ... this according to country music bigshot Shooter Jennings -- the son of country legend Waylon Jennings. Shooter -- a powerful country music DJ -- just went after Mayer on Twitter ...…

Ana Paula Lemes Ananda Lewis Angela Marcello Angelina Jolie