muck (
http://definr.com/muck)
n 1: any thick messy substance [syn:
sludge,
slime,
goo,
gook,
guck,
gunk,
ooze]
2: fecal matter of animals [syn:
droppings,
dung]
v 1: remove muck, clear away muck, as in a mine
2: spread manure, as for fertilization [syn:
manure]
3: soil with mud, muck, or mire; "The child mucked up his shirt
while playing ball in the garden" [syn:
mire,
mud, {muck
up}]