noun (n)

• the trait of indulging in disreputable pranks(noun.attribute)

  Synonym:
  prankishness, rascality
  

  source: wordnet30
• reckless or malicious behavior that causes discomfort or annoyance in others(noun.act)

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

  source: wordnet30