Bert,
My ex-wife's step dad was a metallurgist in London, and during my 4th year in med school spent 6 weeks doing a rotation at Guy's Hospital and stayed with them. I could not only elicit cringing but utter disdain from him. He was quite the chef and wine connoisseur and prepared a big feast (one of many)for a lot (impressed?) of friends about 12 as I recall, and near the end of the meal, I leaned back and exclaimed, "boy, am I stuffed."
Not the thing to say, as I learned later, to the English ear it came out, "boy, am I screwed (but even more vulgar)."
