incubus
/ˈɪŋkjubəs; `ɪŋkjəbəs/ n
(pl ~es or -bi / -baɪ;-ˌbaɪ/)
(a) male evil spirit formerly supposed to have sex with a sleeping woman 梦淫妖（传说与熟睡女子交合的妖魔）. Cf 参看 succubus.
(b) (rhet 修辞) thing (eg an approaching examination, an unpaid debt) that oppresses sb like a nightmare 给某人造成巨大压力的事物（似恶梦中所见的可怕事物, 如临近的考试、 未清偿的债务）.