An emergence of two dominant people (whose names usually begin with the letter K), that change the game forever. The game being, a sport and or parties. Once a K-Era is established it is almost impossible to stop it.
John: Yo, did you go to that K-Era rager last night? I heard 4 people had to go to the hospital.
Steve: Now that the K-Era is established, their football team can't be stopped.