Guybrator is another name for a vibrator for penises. A vibrating cock ring could be considered a guybrator.
More About Guybrator
The term guybrator was popularized in 2014 by the penile vibrator company Hot Octopuss. Their product PULSE was billed as the “World’s First Guybrator.” Some argue this description is simply clever marketing because vibrators for penises have existed for a number of years, one of the most well known being the Cobra Libre. Although vibrators made specifically for penises are designed to stimulate sensitive areas other vibrators aren’t, most types of vibrators can be used on penises. Handheld massagers, external vibrators, and many insertable vibrators can be rubbed along the shaft, head, and testicles.