A list of people you had sex with. It usually contains precise descriptions of the sex encounter and, in some cases, sex relics, such as pubic hair or sex tapes.
1. A calling card for anyone whose business primarily involves fucking others, e.g. prostitutes, politicians, lawyers, etc.
2. A card from any card game designed to fuck with your head or empty your wallet.
That game might have 15% black cards and 85% white cards but they are 100% fuckcards. I'd tell you the name of the game but the fucktards that run the company had their dipshit lawyers send me a C&D letter so I can't. If you need the name of the lawyer I'm sure I have her fuckcard around here somewhere.
Its not self-explanitory, it occurs when there is either an incest relationship because they did not spread apart the genes, therefor resulting in a shallow gene pool.