Duff is Homer Simpson's favorite beer, and it is a popular beverage at Moe's Tavern. Duff is promoted by the their mascot Duffman, whose catchphrase is "Oh yeah!" Duffman is instantly recognizable with his blue and red tights, red cape, white gloves, utility belt holding cans of Duff beer, and the Duff logo on his chest and hat. Everyone will know you are a fan when you wear this Oh Yeah! Duffman Simpsons T-Shirt.