Source : Webster's Revised Unabridged Dictionary (1913)

Shabby \Shab"by\, a. [Compar. {Shabbier}; superl. {Shabbiest}.]
   [See {Shab}, n., {Scabby}, and {Scab}.]
   1. Torn or worn to rage; poor; mean; ragged.

            Wearing shabby coats and dirty shirts. --Macaulay.

   2. Clothed with ragged, much worn, or soiled garments. ``The
      dean was so shabby.'' --Swift.

   3. Mean; paltry; despicable; as, shabby treatment. ``Very
      shabby fellows.'' --Clarendon.

Source : WordNet®

shabby
     adj 1: showing signs of wear and tear; "a ratty old overcoat";
            "shabby furniture"; "an old house with dirty windows
            and tatty curtains" [syn: {moth-eaten}, {ratty}, {tatty}]
     2: mean and unworthy and despicable; "shabby treatment"
     [also: {shabbiest}, {shabbier}]

shabbier
     See {shabby}