Feminist Literature, 1995
The 99.999% of humans who experience no difference between their biology and what they think they are, i.e. have a sense of their gender from where the pee comes out and whether they have the thing which they put in, or the receiving bit where it goes in, when making a baby. Latin is legal and intellectual™.
Although supposedly first coined on the Usenet group alt.transgendered around 1995 by Dutch transgender person Carl Buijs (or Donna Lynn Matthews), or biologist Dana Leland Defosse, or German sexologist Volkmar Sigusch in his research work, it was popularized through a 2007 book titled “Whipping Girl: A Transsexual Woman on Sexism and the Scapegoating of Femininity” by biochemist Julia Serano, who borrowed it from a 2002 post to WMST-L by legendary scholar Emi Koyama (bio: “multi-issue social justice activist and writer synthesizing feminist, Asian, survivor, dyke, queer, sex worker, intersex, genderqueer, and crip politics, as these factors”). Serano is absolutely prolific at creating new words.