A kloppenburg Surprise is when cut a hole in the bottom of a christmas present and set it in your lap while you stick your limp cock inside. Stuff tissue paper inside the box, covering your penis, and ask someone to open it. The victim will be forced to stick their hands inside the box and dig for your surprise.
Klippenberg is a totally awesome surname with orgins from scandinavia. It is usually associated with really hardcore viking-types who drinks beer from bellybuttons.
OH MY GOD! That klippenberg drank beer out of that bellybutton without getting navle-loo in his mouth!