Glossiest

from The Collaborative International Dictionary of English v.0.48

Glossy \Gloss"y\ (gl[o^]s"[y^]), a. [Compar. {Glossier}
   (gl[o^]s"[i^]*[~e]r); superl. {Glossiest}.] [See {Gloss}
   luster.]
   1. Smooth and shining; reflecting luster from a smooth
      surface; highly polished; lustrous; as, glossy silk; a
      glossy surface.
      [1913 Webster]

   2. Smooth; specious; plausible; as, glossy deceit.
      [1913 Webster]