In short: falling in love, acting like an idiot, having communication issues and in the end, everything is for nothing because you didn't get a romantic relationship, you end up being rejected, in the friend zone, dumped.
Why did the word simp became popular and overused?
In short: falling in love, acting like an idiot, having communication issues and in the end, everything is for nothing because you didn't get a romantic relationship, you end up being rejected, in the friend zone, dumped.