Word Origin & History
muckmid-13c., "cow dung and vegetable matter spread as manure," from O.N. myki, mykr "cow dung," from P.Gmc. *muk-, *meuk- "soft." Meaning "unclean matter generally" is from c.1300. The verb meaning "to make dirty" is from 1832; in the figurative sense it is from 1886; to muck about "mess around" is from
EXPAND1856. Muck-sweat first attested 1690s. Related: Mucking.
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