slimiest

from The Collaborative International Dictionary of English v.0.48

Slimy \Slim"y\, a. [Compar. {Slimier}; superl. {Slimiest}.]
   Of or pertaining to slime; resembling slime; of the nature of
   slime; viscous; glutinous; also, covered or daubed with
   slime; yielding, or abounding in, slime.
   [1913 Webster]

         Slimy things did crawl with legs
         Upon the slimy sea.                      --Coleridge.
   [1913 Webster]