资料来源 : Free On-Line Dictionary of Computing

User Brain Damage
     
         (UBD) A description (usually abbreviated) used to
        close a trouble report obviously due to utter cluelessness on
        the user's part.  Compare {pilot error}; opposite: {PBD}; see
        also {brain-damaged}, {PEBCAK}.
     
        (1998-08-27)