Perhaps we are showing our age.
Here in South Australia I use the term "Busman's holiday," but find myself always having to explain it to the younger folk.
One time I was looking after a bay of elderly ladies. One asked me if she may have a jug of cordial. I said, "Look I'm sorry. This hospital does not believe in cordial, but I could get you a nice jug of Adam's Ale." A young nurse in the corner, whom I did not know, loudly told me off: "You are NOT allowed to give the patients alcohol!" The four old ladies immediately started laughing. I turned back to the old lady and said, "Tell you what, I will go right now on my Shank's pony and get you that jug of Adam's Ale." What a wonderful afternoon those ladies had talking about the good old days and things long gone.
I know I picked up these terms from listening to older people, but no-one seems to know them now. Australian? English? I am not sure. I hope some of you still know them. For those who do not, "Adam's Ale" is water, and "Shank's Pony" is walking.
I am sure many of you can come up with long gone terms.
cheers, ADA