Is it really called rat-tail? Rattail?
Rats tail? Was a pretty common strip of hair
growing on the back of the head back in the
mid-80ies, when I was a kid.
I had one too, but near the right eye, and
it was toned blonde.
Nowadays you would be beaten up for wearing
your hair like that. But that was the 80ies, we liked to
be a bit, uhm, "experimental".