Add to ORKGThe purpose of this article is to define the lexical and semantic meaning of common and special slang through practical and theoretical knowledge. In the research process the author has used an extensive scientific literature of domestic and foreign linguists to reveal fully the content and origin of the above concepts. In the article we applied methods of theoretical level, namely abstraction technique representing the cognitive process by which it is obtained a distraction from nonessential properties belonging to general and special slang in order to highlight their most important and regular features; method of generalization by which we establish the general properties and characteristics inherent in general slang and speech formations...