This article is devoted to the review of the main ways of increasing the phraseological units of the language in the context of word creation. The purpose of this article is to study phraseological neologisms as one of the forms of word creation in the lexical system of English, Spanish, French and Russian languages, as well as to identify the main trends in the formation and functioning of new phraseological units. The research is based on lexicographic, descriptive, comparative methods, as well as lexico-semantic analysis and the continuous sampling method. The peculiarities of the formation of phraseological neologisms are illustrated by numerous examples in English, Spanish, French and Russian from modern media, blogs and social networks. The scientific novelty of the research lies in an integrated approach to the study of linguistic and extralinguistic factors influencing the emergence of new phraseologisms in different languages. Phraseological neologisms can either be an integral part of the vocabulary of a particular language, or have only a temporary, momentary, occasional character. The conducted research has shown that in the creation of new phraseologisms, certain samples are most often used, and the most productive ways are borrowing phraseological units, the formation of new phraseologisms by analogy and the creation of author's phraseological neologisms. Of particular interest are cases when the source of new phraseologisms are the titles of books and films, as well as the lyrics of songs.