Source : Webster's Revised Unabridged Dictionary (1913)

Rubbish \Rub"bish\, n. [OE. robows, robeux, rubble, originally
   an Old French plural from an assumed dim. of robe, probably
   in the sense of trash; cf. It. robaccia trash, roba stuff,
   goods, wares, robe. Thus, etymologically rubbish is the pl.
   of rubble. See {Robe}, and cf. {Rubble}.]
   Waste or rejected matter; anything worthless; valueless
   stuff; trash; especially, fragments of building materials or
   fallen buildings; ruins; d['e]bris.

         What rubbish and what offal!             --Shak.

         he saw the town's one half in rubbish lie. --Dryden.

   {Rubbish pulley}. See {Gin block}, under {Gin}.

Rubbish \Rub"bish\, a.
   Of or pertaining to rubbish; of the quality of rubbish;
   trashy. --De Quincey.

Source : WordNet®

rubbish
     n 1: worthless material that is to be disposed of [syn: {trash},
          {scrap}]
     2: nonsensical talk or writing [syn: {folderol}, {tripe}, {trumpery},
         {trash}, {wish-wash}, {applesauce}, {codswallop}]
     v : attack strongly