slimy

Etymology

From Middle English slymy, slimi, either derived from the noun Old English slīm or an unattested *slīmiġ, replacing Old English slipig (“slippy”). Equivalent to slime + -y. Cognate with Dutch slijmig, slijmerig (“slimy”), German schleimig (“slimy; smarmy”), Swedish slemmig (“slimy”).

adj

1. Of or pertaining to slime
2. resembling, of the nature of, covered or daubed with, or abounding in slime
   The frog's body was all slimy.
   Slimy things did crawl with legs Upon the slimy sea. 1798, Samuel Taylor Coleridge, The Rime of the Ancyent Marinere
3. (slang, figurative) Friendly in a false, calculating way; underhanded; two-faced; sneaky; slick; smarmy.
   I looked at this moon-faced, smooth skinned, slimy fraud, with his patronising smile. 1994, Jim Ranie, Jargodin: The Moonlighter, Brisbane: Jim Ranie, page 83

noun

1. A ponyfish.