What Is A Pleb?
In Ancient Rome, the plebeians were the body of free citizens not part of the patrician, senatorial, or equestrian class; average working class citizens. In Bitcoin-speak, "pleb" is a self-proclaimed term for an ordinary person contributing to the Bitcoin network (ie. "stacking sats", "HODLing", running a node, educating, etc.)
Plebs are the white blood cells of the Bitcoin network, helping combat FUD (Fear, Uncertainty, Doubt) by being a vocal participant; helping educate and on-board no-coiners. Most plebs are Bitcoin "maximalists", meaning they are proponents of supporting the adoption and growth of Bitcoin; not broader crypto. Bitcoin is secured by laser-eyed plebs. Few understand this.