Back Alley Slurpee
A sexual act consisting of 2 partners (one of which being male), 1/3 cups of crushed ice, and a straw. The pair puts the crushed ice into the rectum of one of the partners, quickly followed by the insertion of the penis into said orifice. The male then has to quickly finish into the crushed ice, insert the straw into the anus, and slurp up all the refreshing juices inside.
Garth was working all day under the hot Alabama sun, driven on by the thought of a nice back alley slurpee once his task was fulfilled.