Frank Costanza

Frank Costanza is a fictional character from the television series 'Seinfeld,' famously portrayed by actor Jerry Stiller. He is the father of George Costanza and is best known for creating the holiday Festivus, a humorous alternative to Christmas that emphasizes individuality and non-commercialism. Frank's eccentric personality, memorable catchphrases, and his iconic 'Airing of Grievances' speech have made him a beloved figure in pop culture, especially during the holiday season.