Who were the "Yippies" (religion question)

I just read “The Secret Gospel” by Morton Smith. One of the footnotes said :

My question is – who are these Yippies? I assume he’s not talking about Abbie Hoffman and gang. Google and Wikipedia are no help.

That link is all about the political / cultural party of the 60s. I am asking about a religious sect from probably the first or second century.

No, it really is a reference to the 60s Yippies. “Inarticulate utterances” etc. definitely applied to them. A lot of joking around and not taking themselves too seriously. Political and anti-establishment. Make fun of the system to point out the stupidity of it all.

Agreed. Smith was joking.

Apparently the author was comparing such a sect to the Yippies, using a modern reference to shed light on an old entity. And apparently, it was rather tongue in cheek.

Humor! Ar ar ar.

Quick, everyone, point and laugh at the rube who got wooshed!

Ha ha!

Well I did wonder whether it was a joke, but it would have been the only joke like that in the entire book, so I figured it was serious.