Acciside Share definition Flag From which suicide accurs, but without intentional or undoubted knowledge of occurance. Johnny engaged an acciside last night. He was playing the choking game, and apparently, the rope got stuck in itself. He died a horrible death. Acciside by Artemio September 20, 2005 0 0 Get merch Get the Acciside mug. Buy Now — $32.95 See more merch