weasel Noun Any of the carnivorous mammals of the genus "Mustela", having a slender body, a long tail and usually a light brown upper coat and light-coloured belly.
weasel Noun The taxonomic family Mustelidae is also called the "weasel" family.
weasel Noun A devious or sneaky person or animal.
weasel Noun A type of yarn winder used for counting the yardage of handspun yarn. It most commonly has a wooden peg or dowel that pops up from the gearing mechanism after a certain number of yards have been wound onto the winder.
weasel Verb To achieve by clever or devious means.