Besides the standard, literary-colloquial (нормативная литературно-разговорная) speech, there is also a nonstandard (or substandard) style of speech, mostly represented by a special vocabulary. Such is the familiar-colloquial style
(a 'lower' variant of colloquial style) used in very free, friendly, informal situations of communication (between close friends, members of one family, etc.). Here we find emotionally coloured words, low-colloquial vocabulary (See some examples of familiar-colloquial/low-colloquial words (also called 'slang'):
The term slang
is used in a very broad and vague sense. Besides denoting low-colloquial (familiar-colloquial) words, it is also used to denote special social jargons/cants, i.e. words typically used by particular social groups to show that the speaker belongs to this group, as different from other people. Originally jargons were used to preserve secrecy within the social group, to make speech incomprehensible to others – such is the thieves' jargon/cant. There is also teenagers' slang/jargon, school slang, army slang, prison slang, etc. See examples of American army slang: