sicko
noun [ C ] slang uk/ˈsɪk.əʊ/ us/ˈsɪk.oʊ/ sickos
（尤指男性的）精神病人，性变态者
someone, especially a man, who is mentally ill or who performs unpleasant, often sexual, acts
She's afraid of being attacked in the park by a sicko. 她害怕在公园里遭到心理变态者的袭击。