(informal, transitive) To ruin unintentionally. / (informal, Australia, intransitive) To clown around; to have fun, often at the expense of others.

To muck about.

(transitive) To clean the excrement and other rubbish from the area where an animal is kept, such as a horse stable or a dog kennel.

Alternative form of muckamuck

Alternative form of muckamuck

(informal) Gruelling, unglamorous and potentially dangerous military assignments.

plural of muck spreader

Alternative form of muckamuck (person in authority)

(simile) Very common (in various senses).

(informal) The act of botching something; an incompetent mistake. / (Australia, informal) A prank.