Isaiah Washington Faces Heat from GLAAD

Grey's Anatomy star Isaiah Washington is facing even more scrutiny after reportedly making anti-gay remarks about his co-star T.R. Knight last October.

The Gay & Lesbian Alliance Against Defamation said Wednesday that it wants to meet with Washington to emphasize "the destructive impact of these kinds of anti-gay slurs."

Washington was said to have called Knight "a faggot" during an on-set scuffle with another co-star, Patrick Dempsey.

"Washington's repeated use of it on-set and in the media is simply inexcusable," said GLAAD President, Neil Giuliano.

Backstage at Monday's Golden Globes ceremony, Washington denied ever using the slur, telling reporters, "No, I did not call T.R. a faggot. Never happened, never happened."

After Washington's denial, Knight stood his ground during a taping of The Ellen DeGeneres Show Tuesday.

"He referred to me as a faggot," Knight said. "Everyone heard it."