Cooked human meat. Roasted, simmered, served with Chianti - whatever, as long as consuming it should count as cannibalism. It's always miffed me that lurkers have no 'unique' cousine on them or anywhere in their territory, just human hearts and brains in freezers (seasonal candies do not count). I was really stoked to unknowingly become addicted to human meat in NEO Scavenger, and would be just as stoked in Infusion.
Come to think of it, the Tchortist admission interview even brings up human meat consumption, yet no option to actually do it exists...