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

1.
perdere tempo, bighellonare
to spend time doing silly or unimportant things
:
•
Stop mucking about and get your work done.
Smettila di perdere tempo e finisci il tuo lavoro.
•
The kids were mucking about in the garden.
I bambini stavano bighellonando in giardino.