Wiktionary
vb. (context slang video games strategy games English) To attack an opponent with a large swarm of units before they have been able to build sufficient defences.
Usage examples of "zerg".
The ship responded instantly to his command, lurching upward away from the Zerg and bearing Ardo away from his home, his life, and his love.
In the background the muted comm units spoke of mutalisks and Wraiths, of Goliaths and hydralisks, and the starfish things, which they were calling Zerg queens.
Kerrigan's Zerg followers had found and delivered enough minerals and resources to convert those Hatcheries into more sophisticated Lairs .
The Zergs were perfect—they were ugly-buggy aliens that the Confederates could unleash on anyone, and then come in afterwards and eliminate.
It was entirely possible, he realized, that for some of them the nuke had blown the Zergs off them and welded the seals in the battle armor, but not completely crushed them in the blast wave.