stoat
Stoat (noun) means Mustela erminea, the ermine or short-tailed weasel, a mustelid native to Eurasia and North America, distinguished from the least weasel by its larger size and longer tail with a prominent black tip.
Etymology
Comes from Middle English stote ("the ermine, especially in its brown summer coat"), of uncertain origin. It bears some resemblance to Old Norse stutr ("bull"), Swedish stut ("bull, steer") and Danish stud ("steer") (see also English stot), though the semantic link is difficult to make unless a common origin lies in "(brown?) male mammal". It is first attested in the mid 1400s.