A Youtube video with significantly more dislikes than likes. This creates a likes/dislikes bar with a short green bar with a longer red bar, resembling a lightsaber with a green handle and red plasma blade.
When you are done having sex with a girl and you pull out and your shocked to find out your dick is all covered with blood. It looks like a redlight saber.
Person 1:"Did you hear John's girlfriend didn't tell him she was on her period before they had sex?"
Person 2:"Yeah she gave him a redlightsaber"