From WordNet (r) 2.0 (August 2003) [wn]:
sloppy
adj 1: lacking neatness or order; "a sloppy room"; "sloppy habits"
2: marked by great carelessness; "a most haphazard system of
record keeping"; "slapdash work"; "slipshod spelling";
"sloppy workmanship" [syn: haphazard, slapdash,
slipshod]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Sloppy \Slop"py\, a. [Compar. Sloppier; superl. Sloppiest.]
[From Slop.]
Wet, so as to spatter easily; wet, as with something slopped
over; muddy; plashy; as, a sloppy place, walk, road.
[1913 Webster]