Anything filthy or vile. Dirt; something that makes another thing dirty.
Heroin.
Semen.
Soft (or slimy) manure.
The pile of discarded cards.
Grub, slop, swill
Slimy mud, sludge.
To manure with muck.
To shovel muck.
To vomit.
To do a dirty job.
To pass, to fold without showing one's cards, often done when a better hand has already been revealed.
Dirt, filth.
Lack of cleanliness.
Indecency; corruption; unkindness, meanness, spite, harshness, cruelty.
A nasty action, object, quality, etc. (all senses of nasty).
Unpleasantness, disagreeableness (to the senses).