madman

madman
(pl. -men)
  1. a man who is mentally ill
    疯子,精神失常者
    ■an extremely foolish or reckless person
    愚蠢的人;鲁莽的人
    car got out of control—some madman going too fast.
    小汽车失去了控制——那疯子开得太快了。
    ■used in similes to refer to a person who does something very fast, intensely, or violently
    (明喻)疯子
    I was working like a madman.
    我像疯子一样干活。
英语宝典
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