Euro-railing
The act of traveling through the cities of Europe in order to get laid in as many countries as possible. May result in countless horrific and untreatable STDs.
Person A: "I spent the summer Euro-railing across the continent and boy is my cock tired!"
Person B: "I hope you used protection, Brussels got some stank-ass hoes"
Person B: "I hope you used protection, Brussels got some stank-ass hoes"