Source : Webster's Revised Unabridged Dictionary (1913)

Groggy \Grog"gy\, a.
   1. Overcome with grog; tipsy; unsteady on the legs. [Colloq.]

   2. Weakened in a fight so as to stagger; -- said of
      pugilists. [Cant or Slang]

   3. (Man.) Moving in a hobbling manner, owing to ten der feet;
      -- said of a horse. --Youatt.

Source : WordNet®

groggy
     adj : stunned or confused and slow to react (as from blows or
           drunkenness or exhaustion) [syn: {dazed}, {foggy}, {logy},
            {stuporous}]
     [also: {groggiest}, {groggier}]