Source : Free On-Line Dictionary of Computing

sucking mud
     
        (Or "pumping mud") (Applied Data Research) Crashed or
        {wedged}.  Usually said of a machine that provides some
        service to a network, such as a {file server}.  This Dallas
        regionalism derives from the East Texas oilfield lament, "Shut
        'er down, Ma, she's a-suckin' mud".  Often used as a query.
        "We are going to reconfigure the network, are you ready to
        suck mud?"
     
        [{Jargon File}]
     
        (1994-12-15)