The Collaborative International Dictionary of English v.0.48:

Sloppiness \Slop"pi*ness\, n.
   The quality or state of being sloppy; muddiness.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sloppiness
    n 1: the wetness of ground that is covered or soaked with water;
         "the baseball game was canceled because of the wateriness
         of the outfield"; "the water's muddiness made it
         undrinkable"; "the sloppiness of a rainy November day"
         [syn: wateriness, muddiness, sloppiness]
    2: a lack of order and tidiness; not cared for [syn:
       sloppiness, slovenliness, unkemptness]
    3: the quality of not being careful or taking pains [syn:
       carelessness, sloppiness] [ant: carefulness]
    4: falsely emotional in a maudlin way [syn: mawkishness,
       sentimentality, drippiness, mushiness, soupiness,
       sloppiness]