- slop (n.)
- c.1400, "mudhole," probably from Old English -sloppe "dung" (in cusloppe "cow dung"), related to slyppe "slime" (see slip (v.)). Meaning "semiliquid food" first recorded 1650s; that of "refuse liquid of any kind" (usually slops) is from 1815.
- slop (v.)
- "to spill carelessly," 1550s, from slop (n.). Related: Slopped; slopping.