noun (n)

• reckless or malicious behavior that causes discomfort or annoyance in others(noun.act)

  Synonym:
  devilment, devilry, deviltry, mischief, mischief-making, mischievousness, rascality, roguery, roguishness
  

  source: wordnet30
• the use of tricks to deceive someone (usually to extract money from them)(noun.act)

  Synonym:
  chicane, chicanery, guile, trickery, wile
  

  source: wordnet30