Meaning

noun a person who is regarded as treacherous or sneaky

noun small carnivorous mammal with short legs and elongated body and neck

originEtymology tree Proto-Germanic *wisulǭ Proto-West Germanic *wisulā Old English weosule Middle English wēsele English weasel From Middle English wesele, from Old English weosule, from Proto-West Germanic *wisulā, from Proto-Germanic *wisulǭ. The verb is from c. 1900, from the supposed cunningness of the weasel.

Etymology from Wiktionary, CC BY-SA 3.0