The battle tactic when an immense group of poorly equiped or low -level players/minions/characters swarms a much smaller group of well-defended/
high-level characters/players and defeats with sheer numbers.
Originated from the game StarCraft, in which if timed correctly you could send a dozen
zerglings (lowest-level soldier avalible) into
the enemy's base before they could make defenses. Spread to include any battle tactic that involved massive amounts of zerglings to overwhelm the enemy's defense.
"The 2 dozen mid-20 level alliance just zerg-rushed the 60s attacking Darkshire."
"Why bother wasting resources on Ultralisks when 4 dozen
zerglings can rip a
Protoss base up like tissue paper in a zerg rush?"