A D-shaped ring, the flat section attached to a collar/cuff/belt/other surface for the purpose of fastening something to that surface.
The cuffs were clipped together with d-rings
by Psi Sushi November 9, 2003
A sex organ where two penises are coming out of a vagina and the penisheads interlock, and create a D shape
can be in either sex
Greg: Hey, has a wierd thing in her pants
Josh: Thats her D Ring
Greg: Ew, Mike fucked her last night i bet he's scarred for life
by The Italian Ninja March 21, 2011
When you finger a mans dick hole to the point were you see your knuckles.
Hey Stacy did you give Brad a D-ring?
by Sanequea November 29, 2017