A kinkmeme is a place where prompts are posted anonymously and filled anonymously for all manner of, well, kinks. They are extremely popular on LiveJournal, where there can usually be found a kinkmeme community for most popular continua.
Kinkmemes are frequently a good source of material for sporking, although a strong stomach may be required to trawl through some of the material on offer. Anonymity makes badficcers bold as well as goodficers.
It is worth noting that PWP kinkfic is not automatically badfic, and it is not appropriate to spork a kinkfic on the basis that you dislike a particular kink. It is very important to remember YKINMK.