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Quick Answer. In a psychological context, labile mood refers to a mood state in which a person experiences wild, uncontrolled mood swings. Labile mood is also known as labile affect, emotional dysregulation and pseudobulbar affect.
petulant-easily irritated or annoyed; an incorrigibly fractious young man; not the least nettlesome of his countrymen. irritable, peevish, pettish, techy, testy, tetchy, scratchy, nettlesome, peckish, cranky, fractious. ill-natured-having an irritable and unpleasant disposition.he ceased to be a woman, complex, kind and petulant, considerate and thoughtless; she was a Maenad. Moon and Sixpence by Maugham, W. Somerset View in context. It would be the worse for us if our petulant prayers were answered.