Phrasal verb used to denote various stages in the preparation, mastication, and digestion of food, along with the process of eliminating the waste products thereof.
1. Is dinner ready, or are you still working on it?
2. Can I take your plate, or are you still working on it?
3. Man, I'm still working on that tortilla three hours after I ate it.
4. Man, there was so much cheese in that quesadilla that I'm still working on crapping it all out.