NPC stands for "non-player character" and is a term used in video games and tabletop role-playing games to describe characters that are not controlled by a player. NPCs can be allies, bystanders, or competitors to the player characters (PCs) and can fill any role not occupied by a player character. They can also be traders that trade currency for things such as equipment or gear. NPCs vary in their level of detail, with some having only a brief description while others have complete game statistics and backstories.

On social media, "NPC" is often used as a metaphor or meme to describe someone who blindly follows popular opinion without critical thinking. It implies that the person in question conforms to societal or political ideologies without questioning or expressing unique viewpoints. However, it is important to note that the use of "NPC" as an insult or derogatory term can be divisive and can contribute to unproductive online interactions.

In summary, NPCs are non-player characters in video games and tabletop role-playing games that are not controlled by a player. They can be allies, bystanders, or competitors to the player characters and can fill any role not occupied by a player character. On social media, "NPC" is often used as a metaphor or meme to describe someone who blindly follows popular opinion without critical thinking.