Muck partner' The term 'Muck Partner' is a crossword solution composed of two words: Muck and Partner. Muck is a noun meaning wet, soft, and sticky dirt or mud, while Partner is a noun meaning a person who takes part in an activity with another or others. Together, the two words form a phrase that describes someone who works with another person to move, clean, or otherwise handle muck. This could be a job description for someone who works in a mine, on a farm, or in any other environment where muck needs to be handled.