muck about/aroundphrasal verb
to behave in a silly way, especially when you should be working or paying attention to something [= mess around]:
Stop mucking about and listen!
Some of the boys were mucking around on bikes.
to cause trouble for someone, especially by changing your mind a lot or not doing what you promised to do [= mess somebody around]:
The company kept mucking us around and changing the price.
muck inphrasal verb
to do your share of the work that is necessary in order to get a job done:
If we all muck in, we could get the whole house painted by the end of the week.
to share space with other people
muck in with
There are only three bedrooms. Do you mind mucking in with the other boys?
muck something ↔ outphrasal verb
to clean the place where a farm animal lives:
You have to muck out the stables every day in the winter.
muck something ↔ upphrasal verb
1 British English
to do something badly, so that you fail to achieve something [= mess up]:
I really mucked up my driving test first time.
to spoil something, especially an arrangement or plan [= mess up]:
The bad weather mucked up our plans for a picnic.
3 British English
to make something dirty [= mess up]:
Who's mucked up the carpet in here?