The term coprolalia is used to describe involuntary vocalizations that are obscene or socially inappropriate. Coprolalia includes swearing, but also includes saying things that are culturally taboo, socially unacceptable or inappropriate because of age or context.

For example, a child using any kind of obscene language, or anyone saying negative comments about another’s ethnicity or physical appearance. Coprolalia may also refer to these phrases or words being said inside the persons head or kept to themselves which also causes internal distress for the individual.

Coprolalia can be a symptom of some neurological disorders as well as certain brain injuries. Coprolalia occurs as a symptom in only about 10 percent of people with Tourette Syndrome. Copopraxia are gestures and actions of the same nature as coprolalia.

More Info: njcts.org