The Gay & Lesbian Alliance Against Defamation (GLAAD) is demanding rocker John Mayer apologize for using a gay slur during a recent interview.

Mayer quickly apologized for using a racial slur in an interview with Playboy, but he failed to mention a gay slur also used in the interview published Tuesday.

“The only man I've kissed is Perez Hilton,” Mayer answered in the interview.

At a club, while dating Jessica Simpson, Mayer said he attempted to “outgay” Hilton, who was “flitting about … as though he had just invented homosexuality.”

“All of the sudden I thought, I can outgay this guy right now. I grabbed him and gave him the dirtiest, tongue-iest kiss I have ever put on anybody – almost as if I hated fags. I don't think my mouth was even touching when I was tongue kissing him, that's how disgusting this kiss was.”

“I'm a little ashamed. I think think it lasted about half a minute. I really think it went on too long,” he added.

In Twitter posts Wednesday, Mayer apologized for his use of the racial slur: “Using the 'N word' in an interview: I am sorry that I used the word. And it's such a shame that I did because the point I was trying to make was in the exact opposite spirit of the word itself.”

“Just as Mayer indicated in his apology, that he meant no offense in his use of the racial slur, we hope the intent behind his use of the F-word was not malicious,” Jonathan Rosales, entertainment media manager for GLAAD, said in a post at the group's blog Thursday.

“As a public figure with millions of fans, Mayer should be more cognizant of the impact his casual use of both slurs can have,” he added.