The diamond shaped window made by the bottom of a girl's butt and the top of her inner thighs that allows you to see her vagina.
I could see my girlfriend's devil's diamond when she bent over in front of me after getting out of the shower.
by pikabear3790 January 27, 2010
1 more definition
Commonly referred to as crack, this rocky substance is also known as Devil's Diamond because it is considered evil by most sub-urban dwellers. Many urban dwellers use the substance on a regular basis and often don't consider it evil, more so just a way of life.
Sub-urban dweller: "Honey, did you notice that strange man on the corner...I think he was smoking the devil's diamond."
by bmxkilla911 July 23, 2009