A fancy dual entree meal. "Trailer park surf n turf" is two main dishes, say tuna casserole and hot dogs, together. One of the main dishes is fish (surf) and the other meat (turf). In a more elevated atmosphere it might consist of lobster and steak. Alternatives could be: frozen fish sticks, spam, catfish, baloney, etc.
"On Sunday they had trailer park surf n turf washed down with a six pack of cold ones!"