On a podcast, Rowling defined the word 'woman' as the 'producer of the large gametes' (large gametes referring to The Egg), which is obvs terfy as it's attempting to reduce the category of 'woman' to the ability to produce eggs.
'large gamete producer' has since been taken up by terfs as a transphobic dogwhistle.
I had a mild hope it'd be an ironic username, but checked their Tumblr and the first post is digging up someone's dead name, so yikes.
Where I'm from it's usually understood as "questioning". I've seen it more recently being un-abbreviated as 'queer', but most people I know usually still would say "questioning" if someone asked them to say the full name.