This article does not cite any sources. (October 2009) (Learn how and when to remove this template message)
The Gulon is a Scandinavian legend, also known as a "Jerff" in Northern Sweden and "Vielfraß" in Germany. It is a hodgepodge of various creatures, usually described as being the size and shape of a dog, with some cat like features such as the head, ears, and claws. It also supposedly has a thick coat of shaggy brown fur and a tail resembling that of a fox.
The Gulon is notorious as a symbol of gluttony because of the strange eating habits it is supposed to have. It will make a kill and then gorge itself until it is swollen and unable to eat more, at which point it will find two trees and squeeze itself in between them, pushing the meat through its own body before returning to the kill and repeating the process.
Resource: Historia de gentibus septentrionalibus by Olaus Magnus. (The History of the Northern People, 1555 AD)