slosh 
(slŏsh)
(slŏsh)v. sloshed, slosh·ing, slosh·es
v.tr.
1. To spill or splash (a liquid) copiously or clumsily: slosh paint on the floor.
2. To agitate in a liquid: slosh clothes in a solution of bleach and detergent.
v.intr.
To splash, wade, or flounder in water or another liquid: sloshed through the creek.
n.
1. Slush.
2. The sound of splashing liquid.
[Perhaps blend of SLOP1 and SLUSH.]
sloshy adj.