a person who is mentally ill (not in technical use) 精神病患者,疯子(非技术用语) ■an extremely foolish or eccentric person 极端愚蠢的人;狂人 this lunatic just accelerated out from the side of the road. 这个蠢货就从路边加速冲了出来。
adjective
[attrib.]mentally ill (not in technical use) 疯狂的(非技术用语) ■extremely foolish, eccentric, or absurd 极端愚蠢的;古怪的;荒谬的 he would be asked to acquiesce in some lunatic scheme. 他会被要求默许某个荒唐的计划。
语源
Middle English: from Old French lunatique, from late Latin lunaticus, from Latin luna 'moon' (from the belief that changes of the moon caused intermittent insanity)