Merriam-Webster Collegiate Dictionary - wolverine

 noun  (plural ~s)  Etymology: probably irregular from wolv- (as in wolves)  Date: 1574  1. plural also ~  a. a carnivorous usually solitary mammal (Gulo gulo) of the weasel family of northern forests and associated tundra that is dark brown with a light brown band on each side of the body and is noted for its strength  b. the fur of the ~  2. capitalized a native or resident of Michigan — used as a nickname