Doctor Detroit

Doctor Detroit is a 1983 comedy film, written by Bruce Jay Friedman, Robert Boris, and Carl Gottlieb. The film stars Dan Aykroyd, Howard Hesseman, Lynn Whitfield, Fran Drescher, and Donna Dixon, with a special appearance by James Brown. The film was directed by Michael Pressman.

A introverted geek, Clifford Skridlow Dan Aykroyd, is a professor of comparative literature at the financially strapped fictional Monroe College in Chicago.Smooth Walker Howard Hesseman, a pimp, owes 80,000 to Mom Kate Murtagh, a gruff Chicago mob boss. Attempting to weasel out of his debt, Smooth invents a fictitious mobster, the flamboyant Doctor Detroit, who purportedly is overrunning his turf. Ackroyd meets Smooth and his girls Donna Dixon, Lydia Lei, Fran Drescher, and Lynn Whitfield and has the best night of his life partying with them. After finding out about their troubles with Mom, Skridlow agrees to assume the role of Doctor Detroit in an effort to help them. ........

Source: Wikipedia