Don Rickles is famous for his insult comedy, and this week Jimmy Fallon got his own taste of it.

Rickles sat down on The Tonight Show and immediately went to work tearing Jimmy to shreds. "We've known each other a long time," Rickles said to Jimmy, "I know you as one of the finest impressionists. You do great impressions. Besides that, I'm delighted that you have a show because you're fresh, you're funny, you're great, and I want you to know something from my heart: I never liked you."

Rickles also took some jabs at The Roots, and praised the host's "great bit" of having a bandaged hand.

But give Jimmy props: He took it all with endless laughs.