a behavioral attribute that is distinctive and peculiar to an individual
a deliberate pretense or exaggerated display
例句
A type of schizophrenia, usually starting at puberty, characterized by foolish mannerisms, senseless laughter, delusions, hallucinations, and regressive behavior.青春期痴呆一种精神分裂症，通常始发于青春期，其特征为举止痴呆、傻笑、妄想、幻觉以及退化的举止
He's taken on some irritating mannerisms.他新添了些讨人嫌的怪毛病。
