To soil with muck (dirt or mud), or to make messy, or to bungle something.
From Middle English and possibly Scandinavian origins, related to 'muck' meaning 'filthy dirt' or 'manure,' used as a verb to mean 'to make dirty.'
The phrase 'muck-raking' comes from this word—journalists who expose corruption are called muckrakers because they 'rake up' the muck (dirt/filth) hidden in society.
Complete word intelligence in one call. Free tier — 50 lookups/day.