The Collaborative International Dictionary of English v.0.48:

Slopwork \Slop"work`\, n.
   The manufacture of slops, or cheap ready-made clothing; also,
   such clothing; hence, hasty, slovenly work of any kind.
   [1913 Webster]

         No slopwork ever dropped from his [Carlyle's] pen.
                                                  --Froude.
   [1913 Webster]