"In a tweet reply, Elon Musk says 'cis' or 'cisgender' are 'slurs' on Twitter and the 'contemptible creep' who 'manufactured' the term 'has serious problems'."

Whatever one thinks of these terms, I think the one thing we can all agree on is that there is indeed a contemptible creep with serious problems here.

@thurrott What is there even to think about these terms? “Cis” means “on the same side”, “trans” means “on the other side”, as I learned in my organic chemistry class in 1995. It’s Latin. If Elon doesn’t like it, he can build a Time Machine and go lodge a complaint with the ancient Romans. Maybe they’ll feel like putting up with his bullshit.
@JonR no one ever asked straight people if they were ok being called this, thus slur. I don't agree with Musk on much, but he's spot-on here.
@firewyre You a bot, bro? Cisgender means the opposite of transgender. Like heterosexual means the opposite of homosexual. In what universe is that a slur?
@JonR In a universe where people insist on being called “normal” and mean it as “correct.” Because it’s about making affirming themselves while hurting others.