Troublesome, fractious, intractable, uncontrollable, unruly, recalcitrant, wild, rebellious, unmanageable, uncooperative, headstrong, bullheaded, pertinacious, willful, obstinate, mulish, incompliant, incorrigible, insubordinate, ungovernable, unsubmissive, unyielding, impossible ? Now I know who you mean, LH.