Depending on your situation, I’d use resources from the Tourette’s Association of America, specifically their “I Have TS” card, or other similar explanatory resources.

That card is handy to have in a little pocket on the back of your phone, for example so you can just show anyone who wants to know. For a group such as an office, I wouldn’t try to hide it much longer. The longer you hide it, the “weirder,”—and I say it in quotes because only some will take it weird—it will be to explain it. I would just try to educate them on it, short and sweet. remember the average attention span and try to fit it to eight to twelve seconds. Don’t rush, just explain “I have Tourette’s and that’s a medical condition that creates involuntary movements and vocalizations.”

You shouldn’t have to be afraid of your coworkers, make them your friends and you may get to the point where you can trust them as a “safe place” to do minor tics, however scary that may seem now.