/muk/ , n.
1. moist farmyard dung, decaying vegetable matter, etc.; manure.
2. a highly organic, dark or black soil, less than 50 percent combustible, often used as a manure.
3. mire; mud.
4. filth, dirt, or slime.
5. defamatory or sullying remarks.
6. a state of chaos or confusion: to make a muck of things.
7. Chiefly Brit. Informal. something of no value; trash.
8. (esp. in mining) earth, rock, or other useless matter to be removed in order to get out the mineral or other substances sought.
v.t.
9. to manure.
10. to make dirty; soil.
11. to remove muck from (sometimes fol. by out ).
12. Informal.
a. to ruin; bungle (often fol. by up ).
b. to put into a state of complete confusion (often fol. by up ).
13. muck about or around , Informal. to idle; waste time; loiter.
[ 1200-50; ME muc, muk myki cow dung ]