psychopath
noun [ C ] uk/ˈsaɪ.kə.pæθ/ us/ˈsaɪ.kə.pæθ/
psychology specialized变态人格者
a person who has no feeling for other people, does not think about the future, and does not feel bad about anything they have done in the past
(informal psycho)精神病患者，精神变态者
someone who is very mentally ill and dangerous