I was faced with a choice: keep her potty mouth and crassness or research Tourettes and make her believable that she had it. I chose to research.
The most I knew of about Tourettes was from Tourettes Guy. If you know what I'm talking about then you know it's a bit offensive. I turned to Google and read up and found a Youtuber that discussed hers. Still, it wasn't enough, so I tweeted that I had this character and would need help. Someone RT'ed that and I had a guy get in touch with me. His wife had it and he offered to read the story and tell me if I was accurate or not and how much work I needed to do.
Let me just say, after reading his notes I need to do a lot of work with this character. I was actually prepared for that and told him up front if he thought I'd be better off changing her to not have it, I was okay with that suggestion. Representation is important to do right, after all.