A ring a pimp wears. Usually gaudy. Often used to make a pimp-slap hurt more and maybe cut. A special kind involves 5 rings - 1 per finger and spells out "bitch" backwards - that way if the hoe don't have his money, and he slaps her "bitch" is imprinted on her cheek or forehead.
"check out my new pimp ring. It cost $1000. A whole days earnings from one of my hoes."