John Mayer thinks Taylor Swift is the "Mean" one here.
In a new interview with Rolling Stone, the talkative singer, 34, unloads about his ex's 2010 hit "Dear John" -- a typical Swift-ian revenge song that rehashes their brief 2009 fling.
("Don't you think I was too young to be messed with?" Swift, 22, snipes in the ditty.)
"It made me feel terrible," Mayer (whose exes also include Jennifer Aniston and Jessica Simpson) says of the song, "Because I didn't deserve it."
He adds angrily, "It was a really lousy thing to do." And Swift, who has notoriously slammed most of her high-profile exes in song (including Joe Jonas in "Forever and Always," Taylor Lautner in "Back to December," and even her 2009 VMAs foe Kanye West in "Innocence") didn't give Mayer any heads up, he claims.
"I never got an email. I never got a phone call," he relates. "I was really caught off-guard."
And the "Waiting on the World to Change" singer, obviously, doesn't think "Dear John" holds up musically or lyrically, either.
"["Dear John" is] cheap songwriting," he snipes. "It's abusing your talent to rub your hands together and go, 'Wait til he gets a load of this!' That's bulls--t."
The timing of the song's release couldn't have been worse, either. "It really humiliated me at a time when I'd already been dressed down," he says of a period in which he was quoted dropping racial epithets and describing ex Simpson as "sexual napalm" in Playboy.
"I mean, how would you feel if, at the lowest you've ever been, someone kicked you even lower?" he says.
Read more of Mayer's interview in the new Rolling Stone -- and hear about Swift's reaction to his comments in the new Us Weekly!