Individual jargons of professional groups. The three varieties of the criminal world language: general criminal jargon, prison jargon, “professional” jargons. Reasons for the popularity of the jargon of the declassed, the influence exerted by youth subculture. Teen jargons (biosocial striving for detachment and involvement). Professionally oriented youth jargons (emotional-pragmatic and semantic-nominational word coinage, indefiniteness, the estrangement mode in student, computer, military, and trade jargons). Slang. The linguistic phenomenon of modern jargon.