Idiosyncrasy
Part of speech: noun
Definition: A behavior or way of thinking that is characteristic of a person. A language or behaviour that is particular to an individual or group. A peculiar individual reaction to a generally innocuous substance or factor. A peculiarity that serves to distinguish or identify.
Mannerism
Part of speech: noun
Definition: A group of verbal or other unconscious habitual behaviors peculiar to an individual.Exaggerated or effected style in art, speech, or other behavior.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.In fine art, a style that is inspired by previous models, aiming to reproduce subjects in an expressive language.