a person who is mentally ill and who behaves in a very strange violent way 精神病患者;精神病人 In his new film, he plays the part of a crazed psycho. 在他的新电影中,他扮演一个疯狂的神经病。 Don’t let him drive—he’s a complete psycho behind the wheel! 别让他开车——他是个彻头彻尾的神经病!
Word Origin1930s: abbreviation.