Honestly did not know that. Don't know how I would have, given the context in which cis is commonly applied. Context being: heterosexual male. Additional context: Often as an insult. See also: Breeder. (Was that usage archaic? More on that in a moment.)

So we really need a word to define 99.5% of Earth's population? When we have a word to define the remaining .05%? Do you have any idea how silly that sounds?!

20-years, no one will be using it

Been there, seen that, done that. And fuck anyone who doesn't like it. I've equated trans rights with civil rights since before most of you kids touched social media.