I had cause to visit the offices of a well known business consultancy in Chicago. The purpose being to discuss a computer software project.
During the debate on something or another, I used the phrase 'fag packet design'; comments which left one or two people horror struck!
Following the next coffee break, I had to apologise for my gaff and explain that in UK a 'fag packet' was a cigarette carton and had nothing to do with one's sexual orientation. I also had to explain that F.P.D was a phrase for something scratched out quickly and without recourse to formal design conventions.
I think it was W S Churchill who commented that: 'the US and Brits were two peoples separated by a common language'.
Old Duffer