Turducken is a dish
Turducken (sometimes know as a three bird roast) is a dish consisting of a deboned chicken stuffed into a deboned duck, further stuffed into a deboned turkey. Gooducken is a traditional English variant, replacing turkey with goose.
The word turducken is a portmanteau of turkey, duck, and chicken. The dish is a form of engastration, which is a recipe method in which one animal is stuffed inside the gastric passage of another.
The thoracic cavity of the chicken/game hen and the rest of the gaps are stuffed, sometimes with a highly seasoned breadcrumb mixture or sausage meat, although some versions have a different stuffing for each bird. The result is a fairly solid layered poultry dish, suitable for cooking by braising, roasting, grilling, or barbecuing.
Source: Wikipedia
More about Turducken: