Snigger Diddle Share definition Flag When your friend is sad and you wiggle your finger between his butt cheeks to cheer him/her up. Xavier's girlfriend broke up with him so i gave him the ol' snigger diddle. Snigger Diddle by BigFireyAnus777777 November 22, 2013 0 0 Get merch Get the Snigger Diddle mug. Buy Now — $32.95 See more merch