A lobster roll is a kind of sandwich filled with lobster meat. A traditional lobster roll contains the fresh cooked meat of a lobster, tossed with mayonnaise and served on a grilled hot dog bun or similar roll, served so that the opening is on the top rather than on the side.
Some McDonald’s restaurants in New England and the Canadian Maritimes offer lobster rolls as a seasonal menu item, called the McLobster.
The McLobster, a lobster roll, is available seasonally in the Maritime Provinces. It is called McHomard in French.