mischievous


mischievous (http://definr.com/mischievous)

     adj 1: naughtily or annoyingly playful; "teasing and worrying with
            impish laughter" [syn: impish, implike, pixilated,
             prankish, puckish]
     2: badly behaved; "he was saucy and mischievous in school"; "a
        naughty boy" [syn: naughty]
     3: deliberately causing harm or damage; "mischievous rumors and
        falsehoods"