The Oxford Thesaurus An A-Z Dictionary of Synonyms - muckn.

1) ordure, manure, dung, excrement, faeces, droppings; guano: The muck is saved for use as fertilizer. 2) dirt, filth, bilge, slime, sludge, ooze, scum, sewage, mire, mud, feculence, Colloq gunge, gunk, US grunge: Give me a chance to get the muck off my shoes. --v. 3) muck about. fool around, waste time, idle, loiter, mess around or about: She told me to stop mucking about and get a job. 4) muck up. ruin, wreck, destroy, make a mess of, botch, mess up, bungle, Colloq screw up, Slang bugger up, make a muck of: She's mucked up her own life, and, given the chance, she'll muck up mine.