This research was conducted to focus on the slang word formation processes uttered by Kasino character in the Movie. Slang also underwent some processes in general word formation. The research method of this study was descriptive qualitative. The data for this qualitative research were collected from the utterances produced by character Kasino containing slang word. They were obtained by watching the movie and transcribing the movie script. The theoretical framework of word-formation processes was promoted by Elisa Mattiello (2008). The writer found that there were 11 slangs of compounding, 16 slang of prefixation, 19 slang of suffixation, 9 slang of conversion, 9 slang of reduplicative, 2 slangs of acronym and initialism, 6 slangs of blending, 13 slangs of clipping, 98 slangs of variation, and 2 slangs of word manufactured and fanciful formation from the total of 186 data found. It could make the conclusion that the aim of different types of word formation processes assisted people to understand the slang word formation of each word formation processes.