I've often encountered the term 'badwrongfun' used in discussions about role-playing games, and I see that it was already in vogue in the early days of this site judging from answers like this one.
While I think I get the gist of what people are saying when they use the term, I am looking for a definition that includes not just what the term refers to, but also when it is appropriate to use it. I notice that it often gets used to dismiss one side of an argument, as in, "Don't listen to people who say 'that's badwrongfun!' ... there's no such thing as badwrongfun."
I am also curious whether the term originated within the RPG community, and if not, where does it come from and how did it make its way into the language of role-playing games?