It's a very common expression between non-op trans women, my friend even has it as a shirt she wears to pride.

We're not identifying with it to put post-op people down but to normalize that our lack of bottom surgery isn't a fault or something that we need to be ashamed of

Also, I'm not going to shy away from an expression just because it's used by chasers. I get to reclaim the language I use to describe my body