Disappreciating vs disapproving

Once, when I was very young, I read something about someone making a "disappreciative moue". I loved that expression, never forgot it, and used it in a novel. My editor suggests I change it to "disappoving moue". I feel it's not quite the same thing, and I kind of love "disappreciative". But I don't want to make a fool of myself. I've actually never again heard the word disappreciative -- so I'm wondering.

To add context -- the character in question also reads the expression "disappreciative moue", loves it, and want to use it in a story she is writing...

What you think? (ETA: in the subject I've written "disappreciating" because I couldn't remember if the orginal was -ive or -ing. But I think it was -ive.

You all win. I'll just change it to disapproving. Thanks for the feedback! And no, it isn't a real word, but I remember "getting" what it meant. In the book, I also have the character wondering if it's a real word and not finding it in the dictionary, but it's such a minor point I'll skip it. Thanks again.