Synonym of fourth base.
More specifically, when two people go to the fourth floor on an elevator. The power goes out on the way and the elevator falls. Thinking it's their last moments of life and wanting to lose their virginity before they die, they have sex. The power comes back on and they reach the fourth floor. Afterwards it is always awkward between them.

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.