To make foul or filthy; soil; befoul; dirty
A stain or spot (on clothes etc); any foreign substance that worsens appearance.
Previously unknown facts, or the invented "facts", about a person.
Meanness; sordidness.
In placer mining, earth, gravel, etc., before washing.
freckles
Soil or earth.
To do a dirty job.
To manure with muck.
To shovel muck.
To vomit.
To pass, to fold without showing one's cards, often done when a better hand has already been revealed.
Heroin.
Semen.
Soft (or slimy) manure.
The pile of discarded cards.
Anything filthy or vile. Dirt; something that makes another thing dirty.
Grub, slop, swill
Slimy mud, sludge.