slimy

Of or pertaining to slime

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.

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."

A ponyfish.