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"obsessive use of obscene language, either through mental illness or perversion," 1886, from French coprolalie, coined 1885 by de la Tourette, from copro- "dung, filth" + Greek lalia "talk, prattle, a speaking," from lalein "to speak, prattle," of echoic origin.
coprolalia cop·ro·la·li·a (kŏp'rə-lā'lē-ə)
The uncontrolled or involuntary use of obscene or scatological language that may accompany certain mental disorders, such as schizophrenia or Tourette's syndrome.
deviant sexual practice in which sexual pleasure is obtained through the compulsive use of obscene language. The affected person commonly satisfies his desires through obscene telephone calls, usually to strangers. Such telephone encounters may be extremely frightening to the recipients, and this reaction may play a part in the arousal of the scatologist, who often masturbates during the call. Some sexual graffiti also may be related to this deviation