Comedian Kathy Griffin has described Massachusetts Congressman Barney Frank as a “fake gay.”

In a wide-ranging interview with gay weekly Metro Weekly, Griffin applauded President Barack Obama for his endorsement of gay marriage, calling it “fucking huge.”

“Oh, God, it is huge,” she said. “First of all, let me just say this about the president: I love him.”

Griffin added that progress on gay rights takes time.

“[E]ven as early as five years ago, I was bitching and moaning that this stuff's gotta go faster and I'm not gonna stand for it. Yes, it has it to go faster – and it is – but for God's sake, do not turn your back on this president because he's not going fast enough for you, so that you can enjoy President Romney, who's not going to do anything for you.”

Frank, who became the first congressman in 1987 to voluntarily announce his sexual orientation, will marry his long-term boyfriend Jim Ready next month in Massachusetts before Frank leaves Congress but he has said he won't seek recognition for his marriage.

“I have found that in D.C. the residents have just as much of a taste for Hollywood gossip as they do for making fun of Barney Frank, who I believe is a fake gay,” Griffin told Metro Weekly. “I've never met a gay like Barney Frank in my life. So I believe that Barney Frank has been saying he's gay just to get votes all these years. I can't prove it, of course, it's just a theory of someone who's worked with the LGBT community and knows a lot of gay guys.”

(Related: Barney Frank: Obama's secret service would ruin my wedding.)