Definition of muck-about in English:

muck-about

noun

informal, rare
  • A person who behaves in an aimless or desultory way.

Origin

1930s; earliest use found in H. G. Wells (1866–1946), novelist and social commentator. From to muck about.

Pronunciation

muck-about

/ˈmʌkəˌbaʊt/