A weasel is a sneaky and sly person. Your weasel of a friend has a habit of "forgetting" his wallet every time he goes out to dinner with you.

You can call someone who cheats and lies a weasel, or you can use the word literally, to refer to the small furry mammal called a weasel. The furry kind of weasel is known for its short legs, long neck, and musky smell. In fact, the word's Proto-Germanic origin wisand carries the meaning of a stinky animal. The verb weasel means to sneak or evade, like when you weasel out of doing the dishes.

Definitions of weasel
  1. noun
    small carnivorous mammal with short legs and elongated body and neck
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    Mustela erminea, ermine, shorttail weasel
    mustelid of northern hemisphere in its white winter coat
    Mustela rixosa, New World least weasel
    of Canada and northeastern United States
    Mustela nivalis, Old World least weasel
    of Europe
    Mustela frenata, long-tailed weasel, longtail weasel
    the common American weasel distinguished by large size and black-tipped tail
    southern African weasel
    the ermine in its brown summer coat with black-tipped tail
    Poecilogale albinucha, snake muishond
    small slender burrowing muishond with white top of the head
    Ictonyx striata, striped muishond
    ferret-sized muishond often tamed
    Ictonyx frenata, zoril
    muishond of northern Africa
    type of:
    mustelid, musteline, musteline mammal
    fissiped fur-bearing carnivorous mammals
  2. noun
    a person who is regarded as treacherous or sneaky
Word Family

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