"Over Dresden" Is a term used to describe the feeling of the desperate and sudden need to evacuate your bowels, leaving you with a funny walk all the way to the nearest lavatory or until said evacuation takes places, leaving you with an even funnier if not some what smellier walking style.
"Urgh... Really shouldn't of eaten all that cheese. I'm not going to be over Dresden for days..." - Barry Chuckle at the TV Choice awards 2009.