Petulancy :: Petulancy (n.) The quality or state of being petulant; temporary peevishness; pettishness; capricious ill humor.
Petulant :: Petulant (a.) Forward; pert; insolent; wanton.
Petulant :: Petulant (a.) Capriciously fretful; characterized by ill-natured freakishness; irritable.