Ass-Gum: Ass-gum is gum that has been placed within the back pocket of a individual, and sat on. Thus, the gum has became dis-formed, and in some rare instances, smells unpleasant because the subject who processes the gum has farted.
Mike - "Hey Bill, can I have some of that gum please?"
Bill - "Sure Mike, any time."
Tom - "Don't eat that Mike! That's Ass-gum!"
Mike - "Nasty dude, ew, I ain't eating that anymore."