Donald Jay "Don" Rickles (born May 8, 1926) is an American stand-up comedian and actor. A frequent guest on The Tonight Show Starring Johnny Carson, Rickles has acted in comedic and dramatic roles, but is best known as an insult comic.
It is well known that Rickles has nothing against the people that he insults during his routine, and that it's all just part of the act. Although sarcastically nicknamed "Mr. Warmth" due to his offensive and insensitive stage personality, in reality most know him to be actually quite genial and pleasant. It has been said that being insulted by Rickles is like "wearing a badge of honor".
When asked by an interviewer if he ever worried that his insult comedy might ever become too offensive, Rickles replied, "You know, every night when I go out on stage to do my comedy routines, there's always one nagging fear in the back of my mind. I'm always afraid that somewhere out there, there is one person in the audience that I'm NOT going to offend!"