Duffman (Robert Duff) is based on Budweiser's former mascot Bud Man. Duffman's catchphrase comes from the song "Oh Yeah" by Yello, which the producers say became extremely popular after Ferris Bueller's Day Off and many advertisers started using it. As a result, the writers felt that the song and phrase "Oh yeah!" would be suitable for Duffman. Duffman's thrusts were first acted out by Brad Bird.