Source : Webster's Revised Unabridged Dictionary (1913)

Fusty \Fusty\, a. [Compar. {Fustier}; superl {Fustiest}.] [See
   {2d Fust}.]
   1. Moldy; musty; ill-smelling; rank. ``A fusty plebeians.''
      --Shak.

   2. Moping. [Archaic]

            A melancholy, fusty humor.            --Pepys.

Source : WordNet®

fustiest
     See {fusty}

fusty
     adj 1: stale and unclean smelling [syn: {musty}, {frowsty}]
     2: old-fashioned and out of date [syn: {standpat(a)}, {unprogressive},
         {nonprogressive}]
     [also: {fustiest}, {fustier}]