Faff around
Definition 1 of 2
Pro Tip 1/3Time Wasting
Use 'faff around' when someone is wasting time instead of doing important tasks. 
He spent hours faffing around before starting his assignment.
Pro Tip 2/3Colloquial Context
'Faff around' is casual and best suited for informal conversations. 
During the break, they faff around without worrying about work.
Pro Tip 3/3Negative Connotation
The phrase has a slight negative tone, suggesting unproductiveness. 
The manager hates when employees faff around on the job.