Fapnut. -
It is often used as a light-to-moderate insult in gaming lobbies or imageboards to dismiss someone’s opinion. For example, "Be quiet, you fapnut," implies the person being addressed spends too much time in dark corners of the internet and has no "real world" authority. The Rise of Digital Slang
The word is a portmanteau, combining two well-known pieces of internet slang: fapnut.
While it might seem like a throwaway word, fapnut represents the "gamification" of language. It takes sensitive or private topics (like sexual habits) and turns them into a punchline or a label. This helps users navigate uncomfortable topics with humor, though it can also reinforce negative stereotypes about people who spend significant time online. It is often used as a light-to-moderate insult