elephant’s tampon
n.— «I used to be a boogie boarder. While I have long since evolved beyond the lay-down sponge riding, the fact remains that not only did my love affair with surfing begin years ago in the prone position but also, when the conditions are right, I still occasionally kick my way into a beach break barrel or two, sliding merrily along, belly down and ass up, on what the Australians so affectionately refer to as an elephant’s tampon.» —“Walking on Water” by Ethan Stewart Santa Barbara Independent (California) May 17, 2007. (source: Double-Tongued Dictionary)