Coprolalia is involuntary swearing or the involuntary utterance of obscene words or socially inappropriate and derogatory remarks. Coprolalia comes from the Greek ??p??? (kopros) meaning "feces" and ?a??? (lalia) from lalein, "to talk".[1] The term is often used as a clinomorphism, with 'compulsive profanity' inaccurately referred to as being Tourette syndrome.
So, it literally means s@*t talk.