Same word as naughty:

annoying, badly behaved, contrary, disobedient, disorderly, evil, exasperating, fiendish, fractious, froward, headstrong, impish, indecorous, insubordinate, intractable, mischievous, obstreperous, perverse, playful, rascally, raunchy, recalcitrant, refractory, rough, rowdy, sinful, teasing, tough, ungovernable, unmanageable, unruly, wanton, wayward, wicked, willful, worthless, wrong