Jack in the Box Wiki

Hamburgermeister was a member of the Jack in the Box Bunch.

He is depicted as a short elderly German man clad in lederhosen.

He has been shown working at at a Jack in the Box restaurant, presumably cooking up some of his prize-winning hamburgers. 

Hamburgermeister was known for making bad jokes, along with his recurring catchphrase, "That's an old saying I just made up!"

He can also be very clumsy. In How Pain Helps Us, he drops a bowling ball on his feet twice. 

There is some inconsistency regarding the character's name: "Der Hamburger Meister," "Hamburger Meister" (two words), and "Hamburgermeister" (one word) have all been shown in official sources.