The term 'Polecat Cousins' refers to the stoats, which are small mammals belonging to the Mustelidae family. They are also known as ermine or short-tailed weasels and are related to ferrets, minks, and otters. They have a long, slender body with a short tail and are usually brown in color with white underparts. They are found in Europe, Asia, and North America and are known for their agility and cunning.