A sexual act which involves crawling through sand while your partner (Male or Female) attempts to mount and ride the individual crawling through the sand. The crawling partner (henceforth known as Shai-Hulud) must continue the crawl and attempt to burrow as deep as they possibly can. Upon climax the rider must declare as loud as they possibly can that Fear is the Mind Killer and ejaculate onto the back of Shai-Hulud. The DUNE is complete when the rider licks the sweat & ejaculate off of their partner and declares themselves the king (or queen) of the Freman.
Let's sneak away during our beach tip and DUNE each other!
Last weekend Becky got DUNE'D after prom at the abandoned construction site. She hasn't walked properly since.