Zerg is a slang term for a group of low-level gamers who depend on overwhelming numbers to achieve victory, rather than relying on technique or strategy.
We are so trash that we need to zerg in order to getanything done.
To make oneself at home in a friend's place and lay waste there.
Originally from the game Starcraft where Zerg are an alien playable race who tend to expand through the map using their creep.
Mathieu : Man remember that LAN in Cyril's place ?
Yannick : Hell yeah we totally Zerged the place in a minute !
Mathieu : That was before pooping a creep tumor in his bedroom !
The most popular race used today in Star Craft, or it's expansion set, Star Craft Brood War. Zerg are the most commonly used race because of it's ability to rapidly spawn small pack animals known as 'Zerglings' wich are used to swarm opponents and win.
"Dude, I was GOING to win but Mike_23 swarmed me with zergling!"
It's like a bunch of people in an MMO, created from the name of a race in the game StarCraft. People who use this word are complete nerds with no life.