Stands for Stoner Square For Life. The stoner square is the group of the close friends known as T3XxX@$ R@gEr (Pakuna), Sw33d, Am$, Sp3Kt3r (Sundance). They can out-smoke any body krew around.
Random Passerby: Hey you guys, what are y'all doing tonight?
T3XxX@$ R@gEr: Oh, just hanging out with the SS tonight.