It started at 'CC in the 1990s with one particular chap who got promoted quite young. He produced an 'internal memo' which mentioned a 'heads-up' and a 'final walk-through', which caused great amusement.
This was was surpassed in the mid-2000s by a gentleman who arrived from London, who sent out an email that hardly any of us could understand.
We were just simple folk, raised on MATS 1 and 2.