A member of society which is seen as an outcast, knows nothing, and lives under a rock. Often this person is seen as stupid and is almost always ignorant as to what goes on in the world. They have little to no knowledge of how to interact with others.

A person who doesn't realize they are transgender yet, or is in denial; an undeveloped transgender person. When they realize, it's referred to as the "egg cracking."

Somebody who is oblivious to popular culture. They don't understand references to common music, movies, memes, etc.

A person who does not understand a reference to something popular, or the like

A person who does not understand references to popular music, trends, or vines.

someone who literally doesn't know anything about popular culture