coprolalia
Noun
Meaning
an uncontrollable use of obscene language; often accompanied by mental disorders
Source: WordNetHypernyms
Examples
Coprolalia (the spontaneous utterance of socially objectionable or taboo words or phrases) is the most publicized symptom of Tourette's, but it is not required for a diagnosis of Tourette's and only about 10% of Tourette's patients exhibit it.