This thesis investigates neological processes by using a corpus derived from two sources: the teen magazine OK! (issues published from 1990's to today) and various web-sites aimed at a primarily teenage audience. In assembling the corpus the focus was on popular occurrences and the vernacular of the younger population in response to them, based on the assumption that this very sematic field is extremely propulsive and that the vernacular of the teenage population is the most creative one in the formational and lexical sense. The first part of the thesis examines neology in the Croatian language and the status of lexemes extracted from the corpus in correlation to temporal language stratification. The second part of the thesis classifies and analyses word-formation processes by which the collected lexical units were formed. The analysis demonstrates that the most common word-formation processes in teen language are the suffixal formation and compounding. Based on the presence of numerous semantic loanwords, it was concluded that, rather than form new words, it is simpler to widen the meaning by using already existing words from Croatian.