(a.) Unsettled; unsteady; volatile; not considerate.

arch arrogant audacious bantam biggety bluff bold brash brassy brazen bumptious challenging cheeky chutzpadik cocky combative contemptuous contumelious crusty daring defiant defying derisive disdainful disregardful disrespectful facy flip flippant fresh frivolous gally gratuitous greatly daring impertinent impudent insolent intrusive light-minded malapert meddlesome nervy obtrusive pert procacious regardless of consequences rude sassy smart smart-alecky smart-ass uncalled-for volatile wise wise-ass