What is cracking up movie?

Cracking Up is a 1983 comedy film directed by and starring Jerry Lewis and featuring Milton Berle, Sammy Davis Jr., and Herb Edelman. The film follows the story of Warren Nefron (played by Jerry Lewis), a man suffering from a variety of neurosis and phobias who seeks treatment from a psychiatrist. However, things soon spiral out of control as the psychiatrist begins to suffer from mental issues of his own. The film received mixed reviews upon its release, with some critics praising Lewis's performance while others found the film to be overly chaotic and unfocused. Nevertheless, it remains a cult classic among fans of Jerry Lewis's unique brand of slapstick comedy.