I've used the term at times to describe myself, but I don't use it much because I'm not sure if I technically qualify.
I was born XY and raised male, but I have hypogonadotropism; my body is unable to produce normal amounts of hormones. I never really went through puberty; my muscles never grew, my voice never dropped, I never physically masculinized in any way, and my spine bent quite a bit going into my teenage years. I've always been a very hairless and androgynous-looking person, even as a "boy." Since my genitalia never grew, I ended up with pretty severe micropenis. I'm not XXY - I've been tested - and I don't think I've got any internal ovaries or anything like that, though I've never been tested for it.
I certainly border on intersex, but I'm not sure if I am intersex. What do you think?