Ring around the Rubber

The ring that is embedded on your wallet from having a condom in there for a period of more than 6 months.

This happens when you try to prove to your friends, or anybody that you get laid. You occasionally pull it out to show someone, but stupidly put it back in the same place so it can make an indent in your wallet.

This is usually prevelent in the High School age group. For some reason, future computer science Majors and Dungeons and Dragons' Players seem to have a high instance.

My mom still does my laundry. I had to quickly get my wallet out of my pants before she saw the Ring around the Rubber.