Accisass Share definition Flag AcciSass (Acks-ee-sass) is when you accidentally respond to someone with sass, catching even yourself off-guard with your unintentional sassiness. "Geez, thanks for waiting for me!" "I'm so sorry!" "Oh sorry, that was total accisass!" Accisass by A-Ho December 15, 2008 0 0 Get merch Get the Accisass mug. Buy Now — $32.95 See more merch