The article deals with the study of lexical and grammatical features of the English slang.The authors note that slang is a special type of speech activity that arises in a certain social community and is characterized by the use of non-traditional words, expressions and constructions.The article finds that Internet slang is often formed by shortening words, using abbreviations, symbols, as well as using language games, imitations and hints.Special attention is paid to the grammatical features of the formation of Internet slang, such as the use of incorrect word forms, changing the order of words in a sentence, creating new grammatical constructions, and other phenomena.The authors emphasize that Internet slang is an integral part of communication in social networks, it is used to express emotions, indicate certain group affiliations and create a specific language environment; ways of forming Internet slang include a variety of lexical, grammatical and stylistic techniques that vary depending on the context and purpose of use; grammatical features of the formation of Internet slang are manifested in the use of incorrect forms of words, changes in grammatical constructions and deviations from the standard language norm; methods of lexical and grammatical analysis are effective for the study of Internet slang, as they allow to find out the lexical-semantic features of words and their grammatical context.The article examines the semantics of these words, analyzes possible polysemantics, defines their synonyms, antonyms, and homonyms.Attention is also paid to the semantic and emotional loading of these words, which makes it possible to understand their use and contextual meaning.With the help of grammatical analysis, the morphological characteristics of words were determined, their ways of word formation were clarified, and their possible syntactic role in the sentence was analyzed.This analysis helps to understand the peculiarities of the construction of words in Internet slang and their interaction with other linguistic units.