someone with seemingly unlimited energy and/or endurance

Running for exercise and picking up trash you find along the way. It's good for the body, mind, soul, and environment! Started in Sweden but is making its way to the U. S.

he keeps going and going and going and going and going and going and going and going and going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going andand going and going and going and going and going and going and going going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and going

Someone who will never quit trying. They won't give up. Much like the Energizer Battery's Mascot, they just keep going and going and going and going....

A male in his teens or early tweeties who is either unexperienced with sex or just lacks any form of technique. He just jabs in and out hard and fast with no concern for the pleasure of his partner.

A perpetual motion machine.

when a boy is playing video games and 1 or more females are sucking him off