Suddenly, this voice came up and said:
"Army Ninety Twelve; ya'll follow the United Fluff."
My captain looked at me in some amazement and looked sceptical when I told him to get after the United 737 right-to-left ASAP.
I had a similar experience years ago on an early crossing to the UK talking to London Military (don't know if it even exists as a separate ATC control sector anymore).
The controller asked 'Are you carrying a sick parrot?'
It was NATO jargon for an inoperative transponder.