It was a VERY specific term, as much about naming a kind of radical feminist thought as about naming a kind of transphobia.
Then eventually it came to mean “any transphobic feminist”. Then “any transphobic woman”. Then “any transphobe who gestures towards protecting women”. Then eventually just…
I've heard people call it a second traumatization to be called to prove you were raped and subject to disbelief/questioning, but something I see acknowledged less is the way that trauma gets dug up and makes you sick every time you see other survivors being called liars.