Mint Chocolate Chip is one the varieties of flavors in certain brands of Ice Cream. It is often characterized by it's distinct green color, along with chocolate bits in the ice cream, and tastes much like mint with chocolate, similar to a peppermint patty.
It is also known for being a popular brand of ice cream for people to make, brandishing it as a popular homemade ice cream.
Excuse me sir, what flavor would you like again?
I would enjoy a scoop of Mint Chocolate Chip please.