MSAV stands for "Mean Streets of Aliso Viejo". It originated by Sarah Stewart-Bussey as a joke and has continued thus-forth through Aliso Viejo by Dominic Gutierrez. Although a joke, Aliso Viejo has experienced crimes such as a armed theft auto on Chickadee street, a women driving off the end off of Chickadee street in a brand new Mercedes, pockets of weed, cocaine, and some other drugs found in a park, stashed in a abandoned couch and a man on drugs shooting cops with a bow and arrow. Shits tough.
person 1: Where you be from yo?
person 2: Nigguh please, I be from the MSAV.