I have a friend (let's call him Schmecky) who seems to have developed late onset Tourettes Syndrome?

Don't you have anything better to do? Jokes about debilitating neurologic disorders get very old, very quickly, especially for people like ME who have them. Don't be a friking idiot, find something better to do. Like volunteer work or a summer camp on science or sports or something, anything, so your brain doesn't rot and turn to mush. No, that doesn't actually happen, but I'll say this: you're wasting an awful lot of gray matter and brain cells making dumb jokes that are only insulting to a disabled minority group and make you sound incredibly unintelligent. Tourette Syndrome isn't a "cursing disease."