What's the name of the fictitious beer from The Simpsons that has his own human mascot with the catchphrase "Oh, yeah!"?

Duff Beer is a beer brand that started as a fictitious beverage on The Simpsons animated series. Duff-branded beers have been produced in a number of countries, resulting in a variety of legal disputes with different outcomes. At Universal Studios, an official version of the beer is available in three flavors near The Simpsons ride.

Asked by Vasilii Kulev · Last updated 4 years ago · 3.6K views · SOURCE