mannerism

noun mannerisms

1. countable, uncountable A noticeable personal habit, a verbal or other (often, but not necessarily unconscious) habitual behavior peculiar to an individual. The Inspector looked round. He knew well enough that they were alone in the study at The Turrets, but the action had become something of a mannerism with him.
2. countable, uncountable Exaggerated or affected style in art, speech, or other behavior. artists […] dabblingly pursuing a kind of formalist mannerism merely in the interest of careerism

Similar: idiosyncrasy, quirk

noun mannerisms · Mannerism

1. countable, uncountable In literature, an ostentatious and unnatural style of the second half of the sixteenth century. In the contemporary criticism, described as a negation of the classicist equilibrium, pre-Baroque, and deforming expressiveness.
2. countable, uncountable In fine art, a style that is inspired by previous models, aiming to reproduce subjects in an expressive language.

noun

1. uncountable A style of art developed at the end of the High Renaissance, characterized by the deliberate distortion and exaggeration of perspective and especially the elongation of figures.