Slang is a language variety that develops in modern communication and is widely represented in audiovisual media, including films. This study aims to describe the morphological processes of compounding and acronymization in the formation of slang in the film GJLS: Ibuku Ibu-Ibu. This research employed a qualitative approach with a descriptive method. The data source consisted of dialogues among the characters in the film, while the research data consisted of slang words or phrases formed through compounding and acronymization. The data were collected through observation and note-taking techniques and analyzed through identification, classification, and description based on Chaer’s (2022) morphological theory. The results showed ten slang data consisting of two examples of compounding and eight examples of acronymization. Compounding was formed by combining two base forms, while acronymization involved initial letters, syllables, partial combinations of words, and shortening of base forms. The findings indicate that acronymization was the dominant morphological process and reflected linguistic creativity in producing concise and communicative expressions that supported the humorous character of the film’s dialogues
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