nagadashi Posted in N Best definition nagadashi 1. creampie in Japanese, also known as a genre and used as part of titles of numerous popular adult titles from Japan. Nagadashi is a very popular form of sexual act in Japan and in the westernized countries as well. How satisfied are you with the definition? Looking for nagadashi meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 8 times.