Impishly

1. (a.) Having the qualities, or showing the characteristics, of an imp.

2. (adv.) In the manner of an imp.

Thesaurus Entries

as a joke, devilishly, elfishly, for amusement, for fun, for kicks, for laughs, for sport, impishly, in jest, in joke, in play, in sport, jestingly, jokingly, knavishly, mischievously, playfully, prankishly, puckishly, roguishly, scampishly, sportively, waggishly