Coprolalia is a condition that affects about 15% of people with Tourette syndrome. Someone with coprolalia will use words that make people feel uncomfortable so often that it is hard to control. This is often in the form of a stream of curse words.
People who have Tourette syndrome are not the only people who experience coprolalia. For example, it can happen in people who have had a stroke,[1] or who have schizophrenia.[2]