Source : Free On-Line Dictionary of Computing

examining the entrails
     
        The process of {grovel}ling through a {core dump} or {hex}
        image in an attempt to discover the bug that brought a program
        or system down.  The reference is to divination from the
        entrails of a sacrified animal.
     
        Compare {runes}, {incantation}, {black art}, {desk check}.
     
        [{Jargon File}]
     
        (1994-12-12)