Lurker

Noun / UK Slang / US Slang

Lurker refers to someone who observes or participates in online activities, such as forums or social media, without actively engaging or revealing their presence. It can also describe someone who stays in the background or avoids drawing attention to themselves in social situations.

Example: “She’s a lurker on the forum, reading posts but never commenting.”
Means: “She observes the forum without participating or interacting.”

Example: “Stop being such a lurker at the party and join the conversation.”
Means: “Stop staying in the background at the party and start engaging with others.”