eat off something—
1. eat one’s food from a certain container:
- Put vegetables on oven safe plate (you will be eating off this plate) and put in toaster oven.
2. eat part of a piece of food:
- “She always brought in a cake for him,” Foley said. “People would eat off the cake for the rest of the day.”
eat out of something— = eat off something 1:
- Whenever he eats lunch, he eats out of his own bowl and uses his own utensils that he keeps for himself.