When I was growing up in Washington state, a company called Honey Bucket held a dominant position in the local portable toilet market. Their toilets are still a common sight in the American West.
They were so widespread when I was a child that I didn’t know that “Honey Bucket” was the name of a company at all until I moved to Massachusetts for college. I thought “honey bucket” was just the generic term for toilets that could be moved from place-to-place!
So for the first five years that I lived in Massachusetts, I continued to call all portable toilets “honey buckets.”
Until somebody asked me why I called them that—five years after moving!—all my friends in Massachusetts thought that “honey bucket” was just a personal, idiosyncratic, and somewhat gross, euphemism.