a-town Share definition Flag Cali slang for Atascadero. The most badass town on the Central coast. Where the real gangsters kick it. Gangsta1: Let's go party in Paso Robles. Gangsta2: Fuck Paso Robles. It all goes down in a-town! a-town by jay13 February 17, 2008 0 0 Get merch Get the a-town mug. Buy Now — $32.95 See more merch