1. Of a nature causing pain to or startling others, often causing lots of bloodshed and gore.
2. Visually violent, causing the burnage of retinas and temporary colorblindness. Often in reference to something that is bright and contrasts a lot. Often with negative connotations, but not always.
2. You and a friend are in a mall when you see a boy go by wearing a large noen-yellow floppy-brimmed sun hat with an electric blue band and bow, red and black raver goggles around his neck, a day-glo green t-shirt, neon hunter-orange pants with purple leopard print cargo pants tucked into hot-pink boots, and he carries a neon-magenta parasol.
Your friend: "Man, that's violent!"
You: "Yeah, my retinas just shorted out!"
Your friend: "He's pretty smexy, though!"