Playing Fast Ball with the boss

I still get the odd e-mail from my previous boss. I'm not sure if the term fast ball really goes with the word faffing. I think that just using the term fast ball makes him a dickhead:

“Team, please be advised that the attached is a bit of a fast
ball!
There appears to be some confusion of who should be completing
the Diversity Course – Managers, Team Leaders or both.
As it only takes
an hour and all training is good training, save faffing about, can you all
please complete the course before the end of the month.”