Jeff Ross -- 'Dark Knight' Massacre Joke CUT from 'Comedy Central Roast'

Comedy Central is censoring Jeff Ross ... refusing to air the jokes he made about the "Dark Knight Rises" massacre during this weekend's taping of the "Comedy Central Roast of Roseanne."

Ross -- who came to the event dressed like Joe Paterno, accompanied by two young topless boys -- has been under fire for cracking the following zinger, directed at Seth Green:

“Seth, congratulations. This is actually a great night for you ... you haven’t gotten this much attention since you shot all those people in Aurora. ... I’m kidding. You are not like James Holmes. At least he did something in a movie theater that people remember!”