answer:My husband asks me about American sayings all the time. I think it’s cute and I only have the answer about half the time. Sometimes I think it is just about the rhyme, but usually there is some sort of half logical reason for a saying. I can’t think of any off the top of my head that I don’t know some background, because my husband asks me about them often enough that we look up the origin of words and sayings quite often. Some of the more recent would be Blue Plate Special, because that term is still used where I was living previous to where I live now. Many sayings in America come from European languages, We evolve the word and incorporate it into English. Watch the series America’s Secret Slang. I think you will like it. Edit: I tried to provide a link to the series on youtube, but it isn’t working. If you google it should pop up for you though.