David Geffen comes out swinging at Unreal Estate in Frank DiGiacomo‘s Gatecrasher column in today’s Daily News. Responding to his neighbor Ron Burkle‘s suspicion that Geffen was a source for a notorious Vanity Fair profile of the supermarket mogul (whose Greenacres estate is one of the stars of the book, which will be out in twenty days), Geffen tossed out a barnyard epithet and insisted the pair of billionaires are best buds. Burkle didn’t exactly take back what he told me, but stood by his fellow estate-owner. Hey, fellas, relax–even friends disagree sometimes. Just not always in the pages of Vanity Fair.