muck about
US /mʌk əˈbaʊt/
UK /mʌk əˈbaʊt/

1.
lummelen, rommelen
to spend time doing silly or unimportant things
:
•
Stop mucking about and get your work done.
Stop met lummelen en doe je werk.
•
The kids were mucking about in the garden.
De kinderen waren aan het rommelen in de tuin.