I could be wrong but I don't think 'normie' came from 'normalfag'. I'm somewhat skeptical that 'goyslop' was the first use of 'slop' in this way too. And of course 'based' comes from rapper Lil B.
I think "normalfag" is a backformation from "normie"; at any rate, "normie" is itself 4chan slang that entered norm... ie... usage one way or another. "Based" was coined by Lil B but absolutely entered wide usage via being adopted as a meme by 4chan.
