Date: Sometime in the early 21st century.
1: A large gathering of young, insecure males where anal sex is often practised upon one another. Rarely will females attend.
2: Comparsition of penis sizes.
3: A male organ.
4: Location where extremely arousing internet URLs are exchanged.
1: "Jesus Christ! They are having a rousing gekisen downtown, I must attend!".
2: "Let us do a gekisen to see who here has the largest penis."
3: "My gekisen is larger than yours Willis."
Rick: "My Word! Where did you get those erotic internet links from?"
Mick: "I attended a gekisen, there were many arousing links to hot internet websites."