“I hate lying,” Jon Lovitz, the comedian, actor and comedy club owner, said without a touch of humor in his voice. “I just can’t stand it. I don’t see the advantage of it. It makes me physically ill.” It’s the reason, he said, that he has become something of a specialist in portraying characters who are truth-challenged, or, in his words, “sleazy.” He was Tommy Flanagan, president of Pathological Liars Anonymous, on “Saturday Night Live”; the guy on “Seinfeld” who fibs about having cancer, then dies in a car crash; a loudmouth baseball scout who steals scenes from Tom Hanks in “A League of Their Own”; the voice of an obnoxious movie reviewer in the animated series “The Critic”; and the father, in the film “Rat Race,” who tells his family they are on a minivan “vacation” when he is actually trying to win $2 million in a cross-country dash.