Bioprene (noun): (a) an enormous layer of hypodermis or subcutaneous muscle, which mainly utilized for fat storage and which is sold with age or inactivity. (b) A purposefully added level of fat made use of as a natural means to assist tolerate cold water by channel swimmers.Origin: bio + neoprene or polychloroprene, a synthetic rubberized that is used for wetsuits. Neoprene could be the DuPont trade name for its model of polychloroprene. Humorous term for "body fat". Derived from "neoprene".