Whoop-de-doo

I just bought a new English-German dictionary and it has the word "whoop-de-doo" in it. I don't know why I bother. I buy a new dictionary every fifteen years or so to keep up with linguistic developments and this is the kind of nonsense that leaps from the page (it's a page index header to boot). Who is it that determines what shit-de-bum is to be included in dictionaries anyway? I'm sure they must be moonlighting from the world of advertising.