A slimy slug is fun, but a slimy person is tricky. Slimy means either sticky and wet, or dishonest and rude. A creep who sells broken wheelchairs while smiling is slimy.

Slime is a moist and clammy substance, like the stuff a snail leaves behind or the mucus that comes out of your nose. Anything that's slimy is like slime, so it's a good word for describing gross substances. If your oatmeal is slimy, it's less than appetizing, and if a pond is slimy, you probably won't want to swim in it. Figuratively, slimy also means "evil" or "despicable."

Definitions of slimy
  1. adjective
    covered with or resembling slime
    “a slimy substance covered the rocks”
    synonyms: slimed
    slippery, slippy
    causing or tending to cause things to slip or slide
  2. adjective
    morally reprehensible
    “a slimy little liar”
    synonyms: despicable, ugly, unworthy, vile, worthless, wretched
    morally bad or wrong
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