Coming back to the opening post, in my experience over the past 25 years or so, there are massive variations between women who describe themselves as radical feminists. I fine it a bit
when I see either those who don't describe themselves as radical feminists saying "but this is what radical feminists believe," but equally
when I see a radical feminist saying the same thing, or insisting you have to tick this, this, this and this box or you aren't a "genuine" radical feminist.
I'm not big on labelling people anyhow - ideas, streams of thought, political perspectives, yes, but not people.
I have heard the "nigel" term used a few time and I have to confess, I don't particularly like it. On one hand, it reads like a feminist attempt to find a counterpart to "her indoors," or "the wife," to describe male partners, with a feminist twist (and using one silly term to counterbalance another silly term is still silly, in my book.)
I think the idea though is that "a nigel" is supposed to be a man who's the "exception to the rule," a sort of, "well, yes men are sexist, but not my Nigel." While it's true that sometimes women can fail to recognise or even excuse the exertion of male privilege by their own male partners or men close to them, that doesn't mean that any woman who has a male partner or man who is close to them is living in denial. Unfortunately, I've seen the term used in blogs and such in that way - what comes across as a means of dissing or at least making fun women for not being "good enough feminists" because they maintain connections with men in their lives.
I had a cat named Nigel once though, so actually, that's what I think of most when someone says, "your Nigel." He was a fluffy ginger tabby, btw.