noun, transitive verb

The art of using an all-Juggernaut team in Marvel vs Capcom 2, and bombarding the screen constantly with multiple Juggernauts via assists and hyper moves.

Jugger-
from Sanskrit "jagat" meaning "world"
"Juggernaut" is a Marvel comics character whose name is derived from the Hindu "lord of the world"

-spam
from a superfluous, unwanted barrage of digital communication.

NOTE: If both players have all-Juggernaut teams, amounting in six simultaneous Juggernauts, this is called Überjuggerspam.