Forty years after clashing on the set of "Saturday Night Live," Terry Sweeney is making his thoughts known about "ass" Chevy Chase.

Sweeney declined to participate in CNN's upcoming documentary "I'm Chevy Chase and You're Not" (premiering New Year's Day, 8 ET/PT) – but he didn't hold back in sharing his thoughts on Chase in a recent online interview.

In 1985, Chase, a member of the sketch show's inaugural cast returned to host. Sweeney, the show's first openly gay cast member, looked forward to it, he said in the "SNL" oral history "Live From New York," "because to us, Chevy was like a god." But when Chase arrived, he was "a monster," according to Sweeney.

By accounts, Chase asked Sweeney to lick his testicles. He "insulted everybody," Sweeney said in "Live From New York," and suggested a sketch in which Sweeney contracted AIDS and is weighed weekly.

Hearing the joke in CNN's documentary makes Chase laugh uncomfortably. "That's the worst," he assesses before expressing his hope that Sweeney is dead, "because I don't want you talking to him about this."