El Gordo de la Primitiva (lit. the fat one of the primitive (lottery), can be translated as the big one), commonly known as El Gordo, is one of the lotteries of the Loterías y Apuestas del Estado, the Spanish government lottery authority.
The largest prize given at the Spanish Christmas Lottery (and to a lesser extent at any other Spanish lottery), is also referred to as 'El Gordo'.