The Collaborative International Dictionary of English v.0.48:

Mischief-maker \Mis"chief-mak`er\, n.
   One who makes mischief; one who excites or instigates
   quarrels or enmity.
   [1913 Webster]

WordNet (r) 3.0 (2006):

mischief-maker
    n 1: someone who deliberately stirs up trouble [syn:
         troublemaker, trouble maker, troubler, mischief-
         maker, bad hat]