Billionaire Elon Musk, owner of X, formerly known as Twitter, ignited on Monday a flurry of criticism with his misinterpretation of gender-related terminology in a post in which he wrongfully associated the term cisgender with a “heterosexual slur.” Musk stated, “The word “cis” is a heterosexual slur. Shame on anyone who uses it.”

(SOURCE) https://www.advocate.com/news/elon-musk-cisgender-heterosexual-slur