Well. Bear with me here while I try an idea on you: I think it's really important that feminists DO apply the term "cis" to ourselves.
Before you get out the flamethrowers, here's my line of thinking.
We are told that "cis" is the opposite of "trans"
"Trans" now means not just people who want to transition from male to female or from female to male, but anybody who is not comfortable in their "assigned gender."
Gender is a social construct. A load of bollocks. (sorry)
I wrote a piece a couple of years ago in which I said I liked real ale, target shooting, short hair and brogues. Which I do. The very first comment was "this author is probably not cisgender..."
But hang on.
Why shouldn't those be things women do?
I don't want to live in a world where every woman who doesn't live in a world of Heat magazine, pink diets and aspiring to a marriage certificate over a degree certificate, is deemed "not a woman."
I'm not identifying as "on the trans spectrum," despite meeting all the descriptors of someone who is non-binary, because I think that claiming not to be cis is a cop-out. It confirms that "cis women" are all stereotypically feminine. My identity is woman - a woman who was born female and is STILL a woman no matter how short my hair or how masculine my dress or how male-dominated my hobbies.
The biggest challenge to the lunatic fringe of queer politics (and I say that as someone who is queer and has always been if not knee-deep at least ankle-deep in queer politics) is not going to be lots of women confirming their belief that non-conforming women are not cis. It is going to be lots of women challenging it. I'm non-conforming and I'm cis, because I'm not abandoning my identity as a woman just because I'm not girlish.
Call Me Cis. It has a ring to it.
(This post has been brought to you by a slight excess of Hobgoblin Gold. Go on, tell me why I'm wrong.
)