slop

Sticky or squishy mud (or food that's just about as appetizing) is slop. You'll want to wear your tall rubber boots if you're going to walk through the slop on the way to the bus stop.

Farmers feed their pigs slop, a messy, wet mix of various leftovers—and when they do, they can say they slop the pigs. A derogatory way to talk about food that doesn't look very tasty is to call it slop. And you can call sticky, overly sentimental music, writing, or films slop as well. The 15th century definition of slop was "mudhole," from the Old English cusloppe, "cow dung."

Definitions of slop
1

n deep soft mud in water or slush

“they waded through the slop
Synonyms:
mire
Type of:
clay, mud
water-soaked soil; soft, wet earth

n (usually plural) weak or watery unappetizing food or drink

“he lived on the thin slops that food kitchens provided”
Type of:
food, solid food
any solid substance (as opposed to liquid) that is used as a source of nourishment

n wet feed (especially for pigs) consisting of mostly kitchen waste mixed with water or skimmed or sour milk

Synonyms:
pigswill, pigwash, slops, swill
Type of:
feed, provender
food for domestic livestock

n (usually plural) waste water from a kitchen or bathroom or chamber pot that has to be emptied by hand

“she carried out the sink slops
Type of:
waste, waste material, waste matter, waste product
any materials unused and rejected as worthless or unwanted

n writing or music that is excessively sweet and sentimental

Synonyms:
glop, mush, treacle
Type of:
sentimentalism
the excessive expression of tender feelings, nostalgia, or sadness in any form

v cause or allow (a liquid substance) to run or flow from a container

Synonyms:
spill, splatter
disgorge, shed, spill
cause or allow (a solid substance) to flow or run out or over
run out, spill
flow, run or fall out and become lost
Type of:
displace, move
cause to move or shift into a new position or place, both in a concrete and in an abstract sense

v walk through mud or mire

Synonyms:
slosh, splash, splosh, squelch, squish
Type of:
footslog, pad, plod, slog, tramp, trudge
walk heavily and firmly, as when weary, or through mud

v ladle clumsily

slop the food onto the plate”
Type of:
lade, laden, ladle
remove with or as if with a ladle

v feed pigs

Synonyms:
swill
Type of:
feed, give
give food to

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