The Gulon is used as the symbol for glutton as it stuffs more than it can fill. It's blood has aphrodisiac qualities, and was said to be mixed with honey and served at weddings.
It is believed that it was first documented Swedish historian Olaus Magnus. Here is how he is described:
"... great as a great dog, and his ears and face are like a cat's, his feet and nails are very sharp, his body is hairy, with long brown hair, his tail is somewhat shorter, but his hair is thicker and of this they make brave winter caps. Wherefore this creature is the most voracious, for when it finds a carcass, he devours so much that his body, filled by so much meat, is stretched like a drum, and finding a strait passage between trees, he presseth between them, that he may discharge his body by violence, and thus being emptied, he returns to the carcass and fills himself top full."
The Gulon is thought to be just an over exaggerated wolverine. The two animals do share a lot of similarities in appearance and behavior.