The phrase refers to the act of concealing one’s friend list on the Facebook platform. This involves adjusting privacy settings to limit the visibility of connections to others. For instance, a user might want to prevent acquaintances or the public from seeing who their Facebook friends are.
Controlling the visibility of a Facebook friend list offers users greater control over their online presence and personal information. This can be important for maintaining privacy, especially in situations where users prefer to keep their social connections private from certain individuals or groups. Historically, concerns about data privacy and online safety have led to the development and refinement of such privacy settings on social media platforms.