A common strategy where a player mass builds a many weak units as he can, then rushes the enemy base. Usually works best early in the game. Taken from Starcraft, where often zerglings (really cheap unit that can be built in large droves quickly) would be sent at the start of the game to kill everyone in the first couple moments.
Zerg Player: Ah hahaha! I'm zerg rushing!
Protoss Player: Oh no, my precious zealots are too expensive for me to buy more than one. I'm screwed.
Terran Player: *Flys to higher ground* What a bunch of fags.
by Meggido February 28, 2008
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A term used for a swarming attack, and/or winning a battle by throwing bodies and outnumbering an opponent.

This term was derived off of a video game called Starcraft which had a tactic where you are able to rush opponents by mass producing zergs and rushing them
"Oh shit those bastards are zerg rushing us."
"All you pussies can do is Zerg Rush."
by ANtlas May 04, 2005
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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?"
by The Peanut Gallery December 15, 2005
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A quick attack that comes from the game Starcraft. The race Zerg makes units quickly, so a "Zerg Rush" is a quick, weak attack, or an underhand technique. Also an interjection.
Its not only used in SC, but other games and just a random computer thing to yell.
Player A: Well crap, a zerg rush!
Player B: =D

Person A: ZERG RUSH LOL!
by The Bradinater August 12, 2006
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Pre-emptive strike. Comes from the computer game 'Starcraft', in which a race called the Zerg often attack a base early on in a game, when controlled by the game AI.
by Fluoronaut July 18, 2003
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A tactic commonly used on the game Starcraft in which the race "The Zerg" are used in a quick strike.
Player 1:OMG ZERG RUSH

Player 2:KEKEKEKEKE LOL

Player 1:STFU NOOB
by John W. Kole December 25, 2004
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A tactic in video games (primarily the RTS genre) of sending weak, cheap units at an enemy base en-masse in order to achieve victory. This method is used best near the beginning of the match.

Originally started on the RTS game Starcraft due to the inexpensive Zergling unit being used in the manner described above.
Player: ZOMG Zerg Rush!!!
by Burkus May 15, 2009
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