The Collaborative International Dictionary of English v.0.48:

Devilment \Dev"il*ment\, n.
   Deviltry. --Bp. Warburton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

devilment
    n 1: reckless or malicious behavior that causes discomfort or
         annoyance in others [syn: mischief, mischief-making,
         mischievousness, deviltry, devilry, devilment,
         rascality, roguery, roguishness, shenanigan]