"muck" in the noun sense
1. sludge, slime, goo, goop, gook, guck, gunk, muck, ooze
any thick, viscous matter
2. droppings, dung, muck
fecal matter of animals
"muck" in the verb sense
remove muck, clear away muck, as in a mine
2. manure, muck
spread manure, as for fertilization
3. mire, muck, mud, muck up
soil with mud, muck, or mire
"The child mucked up his shirt while playing ball in the garden"
Source: WordNet® (An amazing lexical database of English)
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