Source : Webster's Revised Unabridged Dictionary (1913)

Muck \Muck\ (m[u^]k),
   abbreviation of Amuck.

   {To run a muck}. See {Amuck}.

Muck \Muck\, n. [Icel. myki; akin to D. m["o]g. Cf. {Midden}.]
   1. Dung in a moist state; manure. --Bacon.

   2. Vegetable mold mixed with earth, as found in low, damp
      places and swamps.

   3. Anything filthy or vile. --Spenser.

   4. Money; -- in contempt.

            The fatal muck we quarreled for.      --Beau. & Fl.

   {Muck bar}, bar iron which has been through the rolls only
      once.

   {Muck iron}, crude puddled iron ready for the squeezer or
      rollers. --Knight.

Muck \Muck\, a.
   Like muck; mucky; also, used in collecting or distributing
   muck; as, a muck fork.

Muck \Muck\, v. t.
   To manure with muck.

Source : WordNet®

muck
     n 1: any thick messy substance [syn: {sludge}, {slime}, {goo}, {gook},
           {guck}, {gunk}, {ooze}]
     2: fecal matter of animals [syn: {droppings}, {dung}]

muck
     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}]