Since we're posting wikipedia articles now, why don't we go on over to feministwiki and see what that one says about "TERF" for a more in-depth view as to whether or not women apply to slurs to themselves.
https://feministwiki.org/wiki/TERF
"The oldest known use of the term is by Viv Smythe aka "tigtog" in a blog post from 2008. She defended the term as late as 2018, in an article for The Guardian. Transgender activists frequently try to defend the term on the grounds that Viv Smythe is a woman who herself claims to be a radical feminist, and seems to have first used the term in a way that is not derogatory. Of course, the benign origins of a term does not mean that it cannot evolve into a slur."
"In June 2017, transgender activist Mya Byrne came to the San Francisco Pride Parade with a t-shirt reading "I PUNCH TERFS", decorated with a large fake blood-stain."
"In April 2019, professional video gamer Dominique McLean aka "SonicFox" uploaded a video on Twitter, captioned "what I do to terfs," in which a male video game character strikes a female character's neck so hard that her skin comes off, while the camera shows her agony-filled face."
"McLean's tweet is made even worse by the fact that the hatred is not just directed at an imagined "terf" character, but at the voice actress behind the character, Ronda Rousey. Rousey, who is an MMA (mixed martial arts) fighter, is deemed a "TERF" for having stated, with blunt wording, that it's unfair for male MMA fighter Fallon Fox to compete against women. A year after Rousey's remarks, female MMA fighter Tamikka Brents had suffered a concussion and an orbital bone fracture during a fight with Fallon Fox, but this does not seem to have changed the opinion of trans activists."
"in late 2019, a social media trend dubbed "POV you're a TERF in my mentions" started, in which trans activists would pose with a weapon (baseball bat, sword, machete, or the like), sometimes preparing to strike or showing them mid-strike, taken as a point-of-view (POV) shot and captioned with the phrase "POV you're a TERF in my mentions" or variations thereof. The pictures are supposed to represent the point-of-view (POV) of a "TERF" being assaulted by the depicted person. In other words, women called "TERF" who look at the pictures are supposed to imagine themselves being violently assaulted."
"In May 2020, a blog post was published on Medium.com equating so-called TERFs with Nazis in a credible-sounding tone and explaining how various methods such as infiltration, censorship, property damage, and physical violence should be used against them."
And yet we have a claim right here in this thread that TERF is a term that women apply to themselves. I'm just not finding that claim very credible.