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

diamondbacking 

When a heterosexual white male has sex with a gay black male.

Last night I diamondbacking that nice young African American gentlemen when my wife walked in and caught us.

diamondbacking by ballzdeep69 November 11, 2010

Diamond Backing 

When a girl has anal sex with her boyfriend so that he will propose to her.

Some women will withhold anal sex in their relationship with their boyfriend, but tell them she will do it if they get married. These women are diamond backing when they have anal sex with their boyfriends.

Diamond Backing by someone you know well March 7, 2011