The po' boy (also po-boy, po boy derived from the southern accents often heard in the region, or poor boy) is a sandwich originally from New Orleans, Louisiana. It traditionally consists of a filling, which is usually roast beef, ham, or fried seafood such as shrimp, crawfish, fish, oysters, or crab, on a New Orleans French bread roll cut lengthwise. This "po' boy bread"is known for its crisp crust and fluffy crumb.

Source: Wikipedia