Source : Webster's Revised Unabridged Dictionary (1913)

Rascality \Ras*cal`i*ty\, n.; pl. {Rascalities}
   1. The quality or state of being rascally, or a rascal; mean
      trickishness or dishonesty; base fraud.

   2. The poorer and lower classes of people. [Obs.]

            The chief heads of their clans with their several
            rascalities                           --T. Jackson.

Source : WordNet®

rascality
     n 1: the trait of indulging in disreputable pranks [syn: {prankishness},
           {roguishness}]
     2: the quality of being a slippery rascal [syn: {shiftiness}, {slipperiness},
         {trickiness}]
     3: reckless or malicious behavior that causes discomfort or
        annoyance in others [syn: {mischief}, {mischief-making}, {mischievousness},
         {deviltry}, {devilry}, {devilment}, {roguery}, {roguishness},
         {shenanigan}]