Definitions
1.noun(slimy) mud, sludge."I need to clean the muck off my shirt."
2.nounSoft (or slimy) manure.
3.nounAnything filthy or vile. Dirt; something that makes another thing dirty."What's that green muck on the floor?"
4.nounGrub, slop, swill
5.nounMoney
6.nounThe pile of discarded cards.
7.verbTo shovel muck."We need to muck the stable before it gets too thick."
8.verbTo manure with muck.
9.verbTo do a dirty job.
10.verbTo pass, to fold without showing one's cards, often done when a better hand has already been revealed.