Source : Webster's Revised Unabridged Dictionary (1913)

Slidder \Slid"der\, Slidderly \Slid"der*ly\, Sliddery
\Slid"der*y\, a. [AS. slidor. See {Slide}, v. t.]
   Slippery. [Obs.]

         To a drunk man the way is slidder.       --Chaucer.