OMG you guys have you heard the news? Isaiah Washington and Patrick Dempsey got into a nasty little tiff on the set of the number one show on TV Grey’s Anatomy earlier this week.

No one’s still quite sure why the two had a falling out but apparently it was a feud that finally boiled over.

According to the National Enquirer, it happened like this (loosely):

“What are we waiting on?” said Isaiah.

“Not me,” said Patrick. “I’m always ready.”

“At that point,” said the source, “Isaiah said something mean to T.R. Knight” (who plays mild-mannered Dr. George O’Malley).

“That’s when Patrick told Isaiah, ‘Pick on somebody your own size.’

“Well, that did it. Isaiah became enraged and grabbed Patrick by the throat and shoved him back a few feet. Dr. McDreamy almost landed in McDreamland.”

When Knight demanded that the pair break it up, the source says, “Isaiah called him a bitch. Isaiah stormed off to his trailer to cool off, while Patrick and T.R. stood there in disbelief.

“The director and producers got involved, and a meeting was organized with the network execs.”

Washington came back to the set, and the actors finished their scene, but interactions between the two is said to be tense and no apologies exchanged.

“Isaiah is a theater-trained actor who can’t stand the whole McDreamy magazine-cover-boy furor over Patrick,” says the source.

The Daily News’ source denied Washington choked Dempsey, but confirmed, “Isaiah said some disgusting things. He was in Patrick’s face. I think Isaiah has issues. There’s an underlying jealousy. But it’s not Patrick’s fault. They’ve put a lot of pressure on him by making him the face of the show. Patrick never asked for it, but he promotes the show whole-heartedly.”

Dempsey’s spokeswoman said, “There was an argument on set. In any close-knit family, sometimes people argue. But everybody made up and went back to work.”