pre-feast
The act of eating a moderate and inexpensive meal prior to eating at an expensive restaurant in order avoid ordering a full portion; thus saving money, fulfilling your hunger and enjoying a quality meal.
Friends: Hey lets go out to eat at Gratzi Italian Bistro!
You: Sounds good, but I'm gonna pre-feast with some McChicken sandwiches first. I'll meet you there in a bit.
You: Sounds good, but I'm gonna pre-feast with some McChicken sandwiches first. I'll meet you there in a bit.