What is "neckbreaker"

In professional wrestling, a neckbreaker is any throw or slam that focuses its attack on the opponent's neck. One type of neckbreaker involves the wrestler slamming an opponent's neck against a part of the wrestler's body, usually the knee, head or shoulder. The other type of neckbreaker is a slam technique in which the wrestler throws an opponent to the ground by twisting the opponent's neck. This also refers to a "back head slam" where a wrestler drops to the mat while holding an opponent by their neck.