■ noun
1》 dirt or mud.
↘ informal something unpleasant or worthless.
2》 manure.
■ verb
1》 ( ~ something up ) informal spoil something.
↘( ~ about/around with something ) spoil something by interfering with it.
2》 ( ~ something out ) chiefly Brit. remove manure and other dirt from a stable etc.
3》 ( ~ about/around ) Brit. informal behave in a silly or aimless way.
4》 ( ~ someone about/around ) Brit. informal treat someone inconsiderately, typically by disrupting their plans.
5》 ( ~ in ) Brit. informal share tasks or accommodation.
Phrases
Lord (or Lady ) Muck Brit. informal a socially pretentious man (or woman).
Origin
ME muk , prob. of Scand. origin: cf. ON myki 'dung', from a Gmc base meaning 'soft', shared by meek .