From Wikipedia, the free encyclopedia. Bob Zmuda (born December 12, 1949) is an American writer, comedian, producer and director best known as the sidekick, co-writer and friend of cult personality Andy Kaufman. Bob Zmuda occasionally portrayed Kaufman's Tony Clifton character on stage and for television appearances. In a 2006 interview, Zmuda told the Opie and Anthony Show that it was him as Tony Clifton with David Letterman, and that Letterman did not find out until years after. In 1986, Zm ...