Dung in a moist state; manure.
- A moist sticky mixture, especially of mud and filth.
- Moist farmyard dung; manure.
- Dark fertile soil containing decaying vegetable matter.
- Something filthy or disgusting.
- Earth, rocks, or clay excavated in mining.
- To fertilize with manure or compost.
- To make dirty with or as if with muck.
- To remove muck or dirt from (a mine, for example).
- muck about Chiefly British To spend time idly; putter.
- muck up Informal To bungle, damage, or ruin.