The act of lubricating your hand with vaseline, or another similar substance, and then dipping the lubricated hand into a pile of sand or similar gritty substance. Once the lubricated hand is acceptably gritty, the hand is then inserted into your partner anally. The rapid pumping motion of the hand along with the rugged texture will rip at the anus and cause extreme pain and also extreme pleasure, assuming the masochism is a sexually gratifying experience.
Synonyms include, Revenge of the sand people, Sandy Cheeks, Gritty Salad, and Happy Happy Fun Time............................. with sand.
Tom gave me one hell of a gritty salad last night. I couldn't sit for hours.
That rectal exam was a handful of petroleum jelly and sand away from being a Crispy Fist.