I think this is just a supermarket thing. It's a generic label for the purpose of their inventory system for things they make themselves as opposed to something they sell that was purchased from a primary vendor.

My supermarket has a deli I can order sandwiches from and they'll have "lunch" or something to that effect on the label that has the barcode on it.

We do have very "strict" food labeling laws as far as what you can call a thing based on what's in it, so much so that I basically call it "food language." For example a product that is made with synthetic chocolate is not allowed to be called simply "chocolate," it can be called chocolaty or I think chocolate flavored, but not "chocolate."