xingcat
Be good to self.
Not a deep meaning. Years ago, when email was first becoming a thing people had (yes, there was a time before most people had email addresses), it was discouraged to use your own name for your email address. So for my very first email address, I was looking around my office and I saw a sign that said "CAT XING," like those "animal crossing," or "ANIMAL XING" signs on the road. I flipped those around, wrote out, "XINGCAT" and it just kind of stuck. It's been my name online just about everywhere since then.