Source : Webster's Revised Unabridged Dictionary (1913)

Roguery \Rogu"er*y\, n.
   1. The life of a vargant. [Obs.]

   2. The practices of a rogue; knavish tricks; cheating; fraud;
      dishonest practices.

            'Tis no scandal grown, For debt and roguery to quit
            the town.                             --Dryden.

   3. Arch tricks; mischievousness.

Source : WordNet®

roguery
     n : reckless or malicious behavior that causes discomfort or
         annoyance in others [syn: {mischief}, {mischief-making},
         {mischievousness}, {deviltry}, {devilry}, {devilment}, {rascality},
          {roguishness}, {shenanigan}]