WordNet sense 1 (deep soft mud in water or slush):

mire

WordNet sense 2 (wet feed (especially for pigs) consisting of mostly kitchen waste mixed with water or skimmed or sour milk):

slops, swill, pigswill, pigwash

WordNet sense 3 (an expression that is excessively sweet and sentimental):

mush, treacle

WordNet sense 4 (walk through mud or mire):

slosh, splash, squelch, squish, splosh

WordNet sense 5 (cause or allow (a liquid substance) to run or flow from a container):

spill, splatter