Sex position inspired by wrestling terminology.
A Full Nelson is a wrestling hold that is applied from behind. The holder hooks his arms under his oponent's arms, then clasps his hands behind his opponent's neck. A Half Nelson uses only one arm. A Full Nelson is very difficult to escape from.
A Mrs. Nelson is also applied from behind. The arms are hooked between the woman's legs, then the hands are clasped together behind her back. Also very difficult to escape from.
While he had her immobilized in a Mrs. Nelson, he buried his tongue in each of her holes.