Gluttons, also called wolverines, are the largest animal in the weasel family. They are highly aggressive.
In more recent versions, gluttons are more prone to fleeing than fighting, but are still aggressive enough that they may turn and fight rather than continue to run.
Unlike in the real world, human can keep up with a glutton. However, chasing it will not make the glutton fatigued (even if it is limping and you are skiing). Sometimes when chased it decides to attack. When killed, their skin can be tanned to produce valuable glutton fur. They do not provide much meat when butchered, and the meat gotten is not very nutritious.