The "Vagina-Keepers" is an alternative label to the group of "Trans Exclusionary Radical Feminists" TERF who act as gatekeepers to womanhood by trying to deny MtF (male to female) trans individuals their identity and access to shared protections, based on their lack of a vagina at birth.
After having spent generations fighting to stop using this reductive criteria.
Vagina Keepers is a tongue-in-cheek cross play on the term Gatekeeper who is a person who controls access to something and The Vagina Monologues, a play criticised for its conflation of vaginas as women and women as their vaginas.
The Vagina-Keepers are notorious for making trans-phobic statements such as "I say I'm a unicorn, so that makes me one" as a means to degrade and diminish the trans experience and existence.
Krapen are legendary monsters of giant proportions. They are reportedly sighted after a particularly disastrous misadventure on the toilet seat and the term has come to describe a mythologically disgusting shit. The sheer size and fearsome appearance attributed to the Krapen has made it a common feature in various fictional works.
Bro 1: Holy shit who used this toilet last!?
Bro 2: Haha, yeah dropped a bomb didn't I?
Bro 1: Dude you have totally unleashed the Krapen!!