zerg /zɜː(ɹ)ɡ/noun 1verb 1forms 3 noun1 •(slang, old-fashioned) A very large group of units or players. verb1 •(slang, old-fashioned) To attack an opponent with a large swarm of low-level units before they have been able to build sufficient defences.No one ever did D (or just 3-4 people tried), we just zerged, and we would lose every single AV. — 2008 formszerged · zerging · zergs