Senpai : Someone who will never notice you. (Japanese)An Upperclassman. Used in relation to fellow classmates of higher level or age. It can be used like -chan or -san as well as by itseld. I.E.: "Urameshi-senpai" or just "senpai" Sugoi : Japanese equivalent of either "awesome" or "awful". Most frequently used to mean the former, at least among westerners. Phrase to show excellence, coolness, and awesome powa supa dupa 100% for Japanase girls.