Zigzag is a peculiar word that's been used in some European languages for a few hundred years. But the characteristic pattern has probably been around as a decorative element for a lot longer. It's delightful to see it in wire jewelry. This lovely zigzag earrings tutorial is a gem by Albina Manning.
You can also make less angular and rounder curves with a bail forming pliers as a variation. Good late beginner to intermediate project.