A children's card game, sometimes played with a special deck, where the object of the game is for each player to find matches for all the cards in his hand, without being stuck with the single unmatchable card.
The unmatchable card itself.
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.
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.