Hybrid of "Gray" and "Rainy" usually pertaining to the typical weather conditions in the Pacific Northwest. Also describes the visual appearance of forementioned weather as the light rain looks similar to that of film grain in old black and white movies.
When a man having sex with a woman on the beach pretends to be performing oral sex on her during the missionary position, meanwhile covering his wet penis in the sand, and soon after, surprising the woman by the forcefully thrusting back inside her with the sand-covered penis
A vagina that has some sort of grain like substance in it like sugar or cinnamon from a churro or sand. Usually causes orgasms but may also cause STDs.
