Source : WordNet®

shenanigan
     n 1: reckless or malicious behavior that causes discomfort or
          annoyance in others [syn: {mischief}, {mischief-making},
           {mischievousness}, {deviltry}, {devilry}, {devilment},
          {rascality}, {roguery}, {roguishness}]
     2: the use of tricks to deceive someone (usually to extract
        money from them) [syn: {trickery}, {chicanery}, {chicane},
         {guile}, {wile}]