I don't know how many of you out there have endured the same problem, a few years ago I shared a B707 cargo cockpit with a highly experienced captain whose habitual fruity language was definitely not transmissible. My job, then, was to quickly and accurately translate his sentiments into something which was prior to pressing the PTT button...
I must stress all the ATC units concerned were well South East of Dover!
e.g.
ATC: 'XYZ 123 reduce speed 180 '
Me: 'Speed 180 kts XYZ 123'
A little later......
ATC: 'XYZ 123 reduce speed 160 kts.'
Captain via intercom: " Tell that c**t if we go any slower we'll fall out the f*****g sky..."
Me: (after short pause) 'Um, Unable reduce further XYZ 123'
And.....
ATC: 'XYZ 123 turn left heading 270 degrees'
Captain (via intercom) " Tell that f*****g w@*ker he's just turning us straight into a bloody great CB"
Me: (after short pause) ' Er, Request maintain present heading to avoid buildup XYZ 123'
ATC: 'XYZ 123 climb FL 370 be level in 5 minutes'
Captain: (via intercom) ' Tell that pillock I'm not flying a f*****g Learjet'
Me: 'Erm, unable, Request maintain FL330 XYZ 123'
They never trained me for that in Flight School!
Level 400