Sheridan Whiteside is a fictional character from the play "The Man Who Came to Dinner," written by George S. Kaufman and Edna Ferber. He is a witty and eccentric radio personality who becomes stranded at the home of a Midwestern family after slipping on their doorstep. His stay disrupts their lives and leads to a series of comedic events. Whiteside is known for his sharp tongue and larger-than-life personality, often manipulating those around him. The character reflects themes of social class and the impact of celebrity, showcasing how one person's presence can dramatically alter the dynamics of a household.