Pigs on the chessboard? Didn't you know?
The mate with two rooks on the seventh rank is called the 'Blind Swine Mate' due to their persistent and 'blind' advancement along the rank without flexibility in maneuvers. In this position the rooks act very powerfully despite lacking elegance like 'pigs' that forge ahead. Once on the seventh (or second) rank they completely control it threatening the king and limiting its movement.
The meaning of the name also emphasizes the peculiar steadfastness of these rooks although they move 'blindly' in a limited space their coordinated actions become deadly for the opponent's king especially if it cannot hide behind defensive pieces.
The name of this pattern was invented by Polish master David Janowski who called doubled rooks on the 7th rank - pigs. Sometimes it is said that Aaron Nimzowitsch (1886-1935) gave the name to this mate because he also called two rooks on the 7th rank pigs. But this is incorrect the mate was named specifically by David Janowski.