In 1992 the Rax fast-food franchise launched an advertising campaign featuring a creepy character by the name of Mr. Delicious (aka Mr. D). Imagine a repressed, perverted version of the Jack-in-the-Box spokescharacter with an inability to stay on topic and you'll have a pretty good idea of Mr. D.
Above, a documentary that Rax sent to its franchisees to explain why Mr. Delicious is so awesome. Below, the vlogbrothers' examination of Mr. D.
(I'm not a lawyer, but it looks like trademark for Mr. Delicious has been canceled. Does that mean he's fair game for other uses?)