A bull roast is a meal where beef, typically not an entire bull, is roasted over an open pit barbecue and then sliced up and served. It is similar in concept to a pig roast. The meat at a bull roast is sometimes pit beef and is often accompanied by oysters.
While not technically exclusive to any one particular area, bull roasts are a common social function along the east coast of the United States, especially the Chesapeake Bay area.