The red and green bar under a YouTube video that shows the number of likes (green) and dislikes (red) which closely resembles a Lightsaber from the Star Wars films. More green than red makes it resemble a Jedi Lightsaber and more red than green makes it resemble a Sith Lightsaber.
A lightsaber is a the other word for dick that is used by people who reads bl. Drawing a dick is akward and complicated, so they mostly draw it with happy faces like this ":>" because why not.
Person1:"I want a lightsaber for christmas!!"
Person2:"Me too.... The vibrating ones.."
Person1:"What?"
Person2:*Huh.. What?"