noun
[noncount] informal
wet dirt or mud
chiefly Brit :solid waste from farm animals :manure
informal :something that is disgusting
make a muck of something
Brit informal :to do something badly or with many mistakes
verb
mucks; mucked; mucking
muck about/around
[phrasal verb] Brit informal
to spend time doing things that are not useful or serious :to waste time
muck about/around with (something) :to use or do (something) in a way that is not very serious
muck (someone) about/around :to be unfair or dishonest with (someone) :to lie to or cheat (someone)
muck in
[phrasal verb] Brit informal :to help out especially by doing work
muck out
[phrasal verb]
muck (something) out or muck out (something) informal :to clean (the place where a farm animal lives) :to remove animal waste and dirty hay, sawdust, etc., from (a place, such as a barn)
muck up
[phrasal verb]
muck (something) up or muck up (something) chiefly Brit informal
to make (something) dirty
to spoil or ruin (something) :to make mistakes in doing or making (something)