However, it's possible that you've encountered a specific subculture or group where "acetate" might be used as slang for something else. Could you provide some context about where you heard it? For example:
* Where did you hear it? (e.g., online forum, TV show, conversation with friends)
* Who was using it? (e.g., teenagers, musicians, artists)
* What was the situation? (e.g., talking about clothes, music, drugs)
With more information, I might be able to help you understand what "acetate" meant in that specific context.