He wrote for Richard Pryor .
Bob Altman ( September 11 , 1931 -- March 10 , 2017 ) was an American comedian and free - associating thinker more popularly known as Uncle Dirty .
Bob Altman wrote for Richard Pryor .
Bob Altman ( September 11 , 1931 -- March 10 , 2017 ) was an American comedian and free - associating thinker more popularly known as Uncle Dirty .