The Frankensteiner is a professional wrestling move. It was named by Scott Steiner who used it as a finishing move.
The recipient of the move stands upright as the attacker jumps on their shoulders from the front, facing the opposite direction so that the recipient's face would be in the attacker's gut and the attacker's legs would be hanging over the back. Then the attacker does a back flip, landing on their head and arms and dragging the recipient over in the process. The recipient lands on their head or neck.