An NPC stands for a non-player character, which is any character in a game that is not controlled by a player. The term originated in traditional tabletop role-playing games such as Dungeons & Dragons, where it applies to characters controlled by the gamemaster or referee. In video games, NPCs can be governed by computer code, or they can be controlled by the games master in a tabletop RPG. NPCs can be allies, bystanders, or competitors to the player characters (PCs) . 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 may have complete game statistics and backstories. In some games and circumstances, a player who is without a player character can temporarily take control of an NPC.

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. The term "NPC" is typically used in online discussions, debates, or political discourse as a way to criticize or dismiss someones arguments or perspectives. It suggests that the person is merely regurgitating scripted responses or adhering to a predetermined set of beliefs without engaging in independent reasoning or original thought. 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. It is always advisable to engage in respectful and constructive dialogue when discussing differing opinions or viewpoints on social media.