faff

I have never heard this word, but I wonder if it is related to the Slovene vulgarism fafati, which means "to fellate".

British slang - "Verb. To fuss. E.g.'If you stop faffing and let me finish doing this job, then we can go out to the cinema sooner, rather than later.' {Informal}
Noun. A fuss, bother. E.g."It's such a faff having to go through the process of interviews when you know you are the only candidate worthy of the job.' {Informal}"
- peevish.co.uk

to waste time, fool around.