What is meant when someone calls someone a 'PLEB'?

The term 'pleb' is a slang abbreviation of 'plebeian,' historically referring to the common people of ancient Rome. In modern usage, it is often used derogatorily to describe someone perceived as unsophisticated, unrefined, or lacking in social status or cultural knowledge. Calling someone a pleb can imply that they are of lower status or not part of an elite group. It's frequently used in online discussions, especially in gaming and social media contexts.