The full form of PLEB is plebeian
This slang term is the shortened version of plebeian. The definition of plebeian meaning a lower-class person from Rome translates into today’s culture as an individual of low class.

Pop culture uses the term to mean someone who has done something idiotic without interest. A generic nearly boring person soon becomes a ‘pleb’ to the rest of the world. The common personality or basic ideas of a person make them a perfect example of the term ‘pleb’.

Origin of PLEB
Pop culture’s slang use of ‘pleb’ seems to have originated in the world of Ancient Rome. The Romans used the term to differentiate between the upper-class elite society and lower-class people. The term moved through history with an English adaptation from the Latin term for commoners in the year 1590. It continued to rise through the years with the 70s use as a way to describe someone with bad taste. Social media took ahold of the term and it has risen to greatest use in all of history.

Conversation Examples
Texter 1: Hey do you want to go get some lunch?
Texter 2: Sure.
Texter 1: Do you want me to come get you or want to just meet me there?
Texter 2: Can you come get me, but I’m not home.
Texter 1: ???
Texter 2: I’m at Alice’s house.
Texter 1: No way, I’m not coming to that plebs house.
Texter 1: Drive yourself and don’t bring her.