Somoan Backwash Share definition Flag Kissing a girl who has sucked a dick without prior knowledge. "Did you hear? The Prom King got a Somoan Backwash" Somoan Backwash by DoctorBadDragon November 19, 2016 0 0 Get merch Get the Somoan Backwash mug. Buy Now — $32.95 See more merch