An activity in which one engages in sexual activity with another person, whom neither have ever seen/met in real life before. Usually the two meet online.
Guy 1: Dude! I offered to trade money for one of my online friends' love yesterday!
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 sluttook my fifty bucks and gave me a prostitution ring that could be the clap!