Definitions by Ron New Mexico

diamondbacking 

the intentional practice of unmarried heterosexual women to engage in anal intercourse prior to marriage, and then refuse afterward once that diamond ring is hers (punning on "barebacking").

Dan's really regretting this marriage: turns out his GGG fiancee turned into a diamondbacking pumpkin at the stroke of midnight after the wedding

diamondbacking by Ron New Mexico October 17, 2010