It refers to someone recognising the patriarcal systems that exists in the world.
A play on the term "red-pilled" based on the movie Barbie where Barbie is offered the learn the truth by picking flat Birkenstock (and travelling to the real world) or picking a a pair of pink high heels that reject that for keeping things as they are and ignoring reality.
I used to think men should be paid more but then I got Birkenstock-pilled and realised women deserve to be paid the same for equal work
Series presented as documentaries but will exclude or misrepresent facts through thematic music/ quick cuts and other editorial techniques to make the show more entertaining
"I loved Tiger King, it's such a good documentary!"
"No it's actually docutainment since they hype up Carol Baskins to be a killer and exclude his racism."