Definition of slang

The interest of researchers for different types of profanity, especially for such a specific, as slang, has always existed.
And it is understandable, since slang attracts by its metaphors, expressiveness and "nontraditional" category: "Slang is
used in stylistic purposes: to create the effect of novelty, unusual, different from the accepted samples for transmission
a certain mood of the speaker, to give utterance concreteness, vividness, visibility, accuracy, brevity, imagery, and
it helps to avoid cliches. "