informal
1
: wet dirt or mud
Clean that muck off your shoes.
2
chiefly British
: solid waste from farm animals : manure
3
informal
: something that is disgusting
How can they expect us to eat this muck? [=garbage, junk]
Cite this Entry
“Muck.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/muck. Accessed 20 Apr. 2026.
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