Smartie Spaff Share definition Flag The act of shaking smarties from a tube, held at crotch height, into or onto someones face. "Mate, let's smartie spaff that girl!" Smartie Spaff by Sheddybear October 27, 2011 0 0 Get merch Get the Smartie Spaff mug. Buy Now — $32.95 See more merch