Abbreviation for "Stay Awake". It's an anonymous group of people. Tagged in places with the symbal of a ghost with the bottoms dripping down and with the letters "SA" or "Stay Awake" to the right or left of it, followed with your area code on the bottom of the writing. Has no certain colors and is not gang-related. Stay awake means stay conscious of your surroundings, environment, and society. Basically stay awake to what goes on around the world don't shut down and ignore everything. Is usually tagged in various places and is usually small.