имя существительное 1) а) [зоология] ласка, горностай (и другие животные семейства куньих) б) мех ласки, горностая 2) проныра 3) снегоход; вездеход Например: weasel words [используется в разговорной речи] — обтекаемые выражения, ни к чему не обязывающие слова; намеренная двусмысленность to catch a weasel asleep — застать врасплох человека, обычно настороженного
I. noun (plural weasels) Etymology: Middle English wesele, from Old English weosule; akin to Old High German wisula weasel 1. or plural weasel any of various small slender active carnivorous mammals (genus Mustela of the family Mustelidae, the weasel family) that are able to prey on animals (as rabbits) larger than themselves, are mostly brown with white or yellowish underparts, and in northern forms turn white in winter — compare ermine 1a 2. a light self-propelled tracked vehicle built either for traveling over snow, ice, or sand or as an amphibious vehicle 3. a sneaky, untrustworthy, or insincere person II. verb (weaseled; weaseling) Etymology: weasel word intransitive verb 1. to use weasel words; equivocate 2. to escape from or evade a situation or obligation — often used with out transitive verb to manipulate shiftily
(Cambridge) A naive user, one who deliberately or accidentally does things that are stupid or ill-advised. Roughly synonymous with loser.