Any one of various species of small carnivores belonging to the genus Putorius, as the ermine and ferret. They have a slender, elongated body, and are noted for the quickness of their movements and for their bloodthirsty habit in destroying poultry, rats, etc. The ermine and some other species are brown in summer, and turn white in winter; others are brown at all seasons.
One thing that worried me was how writers get categorized and so they end up having to write the same kind of book again and again. That is fine if it is what you want to do, but I would rather be locked in the trunk of my car with a weasel than write the same book every three years until I die. Justin Cronin