Fans are awesome. That's all you can say when you encounter this story.
Graf. It was made up in a book by an author. Homebrewers thought it sounded good and made it.
Stephen King invented a drink for his fantasy world, and people are making it based on the description.
Homebrewer "Brandon O" seems to have created the grandfather of the many variations that exist, now.
Hell, I'm not going to explain it. Here's a video.
A beverage that sounds amazing in a book, made by people, and now the idea has taken on a life of its own i the world, as people brew and create and it won't be long before someone is selling this stuff and making a living at it.
Is it any wonder operating on the boundaries of things, where speculation and life happens, is an addictive thing that makes me excited to get to work today.
Also, regarding the beverage of choice in the Dogsland novels, please do not anyone invent "Piss Gin" because I would really prefer not to be the person who gets blamed for that. (Khali would be neat, though.)