Definitions of slop:

• noun:   wet feed (especially for pigs) consisting of mostly kitchen waste mixed with water or skimmed or sour milk
• verb:   feed pigs
• verb:   ladle clumsily

  Example: "Slop the food onto the plate"

• verb:   cause or allow (a liquid substance) to run or flow from a container
• verb:   walk through mud or mire