See muck in Webster's New World Roget's A-Z Thesaurus II
noun
A viscous, usually offensively dirty substance:
mire, ooze, slime, slop, sludge, slush. See cleanFoul or dirty matter:
dirt, filth, grime. (Slang) crud. See clean
verb
To soil with mud.
Also used with up: bemire, mire, mud, muddy, slush. See clean
phrasal verb muck up- (Informal)
To harm irreparably through inept handling; make a mess:
ball up, blunder, boggle, botch, bungle, foul up, fumble, gum up, mess up, mishandle, mismanage, muddle, muff, spoil. (Informal) bollix up. (Slang) blow1, goof up, louse up, screw up, snafu. Idiom: make a muck of. See correct, help
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