I guess that’s how it’s used in recent years, but it was definitely 4chan speak in the past and it was definitely pejorative. I still associate it with channers and incels. I recognize that the term has ironically been taken over by the “normies” themselves but that inevitably happens to all memes and slang.

Under settings there’s a tab for blocks at the top and it has a list and you can manage them there. At least there is on lemm.ee, but I’d assume all lemmy sites have it.