To attack an opponent with a large swarm of units before they have been able to build sufficient defences.(verb)
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Use "zerg" in a sentence
"So when you fight 3 or more other 'average' size alliances, you get outnumbered pretty quickly and the label zerg comes into play, mostly because the lack of organization that can exist in large battles when you have multiple teams playing a single side using different voice channels for communication, etc."
"“Rule number one for running an empire, son: When the zerg are a topic of conversation, the niceties go out the airlock.”"
"The critical feature underlying the difference seems to me is: "PvP for the sake of PvP" - the assumption here is then the zerg is a convenient vehicle by which to further an activity which most players want to engage and *can*."