a cramper is someone who just basicly sucks to be around and at the same time ignorantly thinks they are so cool to hang out with, no one ever knows how they got there or who invited them but no one ever tells them strait up to hit the road

Someone who is possessed by clout chasing. The original human is now gone and a demonic entity that feeds on clout is all that is left. An empty shell with no control of their actions, forced to blindly react to situations they think will bring them attention.