A foosebag is in the same category as douchebag, toolbag, cockknocker, etc.
It describes anyone who deserves to be called a foosebag.

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.