Tag alias: backpiece -> back_tattoo

I don't claim to be a tattoo expert of any kind, and it may very well be that "backpiece" is the industry term for tattoos on the back.

But I'd argue that it's a hell of a lot less intuitive, and probably not what most people are going to try searching for, first. Hell, I only heard of the term a few minutes ago because I came across it here.

If there's a difference, I'd love to hear it.

It would seem the tag was created by a single user. I can't say I'd have recognized the tag "backpiece" if I saw it by itself.

I would support using back_tattoo. If there is some reason to keep the term "backpiece" or "back_piece" in the name, then backpiece_tattoo or back_piece_tattoo.

back_tattoo is much clearer for the layperson, so we'll go with that.

As for an alias, I don't know, if only one person was using backpiece I'd rather not alias something potentially ambiguous.