Gouger is one of the four boars that pull the Hogfather's sleigh. The other three are Rooter, Tusker and Snouter. It is very possible that, as the biggest, meanest, most manically red-eyed (as opposed to red-nosed) boar in the pack, Gouger merits the definitive entry for all four as the Discworld's answer to Rudolph, the Red-Nosed Reindeer. It was most possibly Gouger who was first, as is the right of the alpha boar, to allow his bladder full release all over the floor in Crumley's. And anyone who has ever had to do with the living porcine will know that pig slurry stinks..