Conan O'Brien called out one of the writers on his talk-show after the writer went on a Twitter rant slamming the state of late night TV comedy.
Writer Andres du Bouchet went on the Twitter rant on Thursday.
He has since deleted the tweets, but their contents have been preserved by The Hollywood Reporter.
"Comedy in 2015 needs a severe motherfucking shakeup," he wrote. "No celebrities, no parodies, no pranks, no mash-ups or hashtag wars. I'm fat."
He added, "shove your lip-synching up your ass."
He continued: "Prom King Comedy. That's what I call all this shit. You've let the popular kids appropriate the very art form that helped you deal. Fuck...None of the funniest stuff ever involved celebrity cameos."