According to a lawsuit filed moments ago in Los Angeles County Superior Court, the Sex Pistol singer allegedly beat the crap out of a female assistant after calling her every horrible name in the book after the taping of a television show in 2007.

In the lawsuit, Roxane Davis claims Rotten, real name John Lydon, "cocked back his fist ... and punched her in the face" when the rocker was forced to stay in a room at the Ritz Carlton Hotel that didn't share a door with his other assistant ... a dude named Rambo.

Davis says both Rotten and Rambo unleashed a verbal tirade, calling her a "fat f**king c*nt, f**king c*nt, and fat f**king whore." - more on this story

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