Britannica Dictionary definition of MUCK
[noncount]
informal
2
chiefly British
:
solid waste from farm animals
:
manure
3
informal
:
something that is disgusting
make a muck of something
British, informal
:
to do something badly or with many mistakes
— mucky
/ˈmʌki/
adjective
muckier;
muckiest
2
muck
/ˈmʌk/
verb
mucks;
mucked;
mucking
mucks;
mucked;
mucking
Britannica Dictionary definition of MUCK
muck about/around
[phrasal verb]
British, informal
1
:
to spend time doing things that are not useful or serious
:
to waste time
2
muck about/around with (something)
:
to use or do (something) in a way that is not very serious
3
muck (someone) about/around
:
to be unfair or dishonest with (someone)
:
to lie to or cheat (someone)
muck in
[phrasal verb]
British, 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]
1
muck (something) up
or
muck up (something)
chiefly British, informal
:
to make (something) dirty
2
:
to spoil or ruin (something)
:
to make mistakes in doing or making (something)