Regarding why in a lot of my bios it says "Millie's autistic child /hj"

So, if you look at my socials, most of them say "Millie's autistic child /hj" at the end of my bio, and you're probably thinking, "Why, they're mocking autism!," I'm not, I put half joking because I haven't been diagnosed yet and I'm not sure if I actually have autism. Who is Millie? Well, Millie is my best friend, and sometimes she makes jokes about how I'm her autistic child, and that just stuck, so I thought it would be humourous to put that I'm her autistic child in all my bios, with the tone tag that indicates half-joking because I don't wanna lead people to the thought I'm mocking autism.