prostitution ring 

a prostitution business, usually in a large city, where hookers are brought in from other cities to work for a few weeks or maybe months, then they leave town and are replaced by other women, and so on and so on

There is a new Asian prostitution ring in town, with high quality and reasonable prices

prostitution ring by Woody Thomas December 25, 2008

prostitution ring  

The circular area of discoloration left after an encounter with a hooker, usually viral or parasitic in nature. Other possible origins can be from rough sexual encounters, the use of cock rings, or being bitten while receiving a blowjob.

Man, I've got to go the doctor! That slut took my fifty bucks and gave me a prostitution ring that could be the clap!

prostitution ring by gland cyclops January 10, 2009