A slang of a certain language is a language variant not accepted by the standard language, not necessarily because it does not exist as such in dictionaries, but because of the semantic nature of its words. It is considered to be an important asset of self-affirmation as well as an indicator of belonging to a certain group. Considering the factors which contributed to the development of slang in Sweden, an increase in its use and acceptance of its "import" into the Swedish language started happening simultaneously as people started migrating to Sweden; particularly it’s Rinkebysvenska, a variant of Swedish spoken in the suburbs around Stockholm and inhabited by a large number of national minorities that’s had a significant influence on the development of slang. Other factors include the rapid development of social networks and the use of slang to conjure a sense of belonging. However, the use of slang is considered to be inappropriate by many, and the thematic hierarchy of slang shows that it accumulates for words that we can collectively classify in the sphere of illegal way of life. Accordingly, slang is semantically most often of pejorative value, which can be seen in Swedish slang even for the everyday nouns “flicka” (‘girl’), “pojke” (‘boy’) and “pengar” (‘money’). In comparison with Croatian slang of the same nouns, it is evident that the thematic categories of slang overlap in both Swedish and Croatian and that vulgarisms and pejorative value are also characteristics shared by both languages.