a move in which a wrestler stands behind his/her opponent, puts one or both arms under the opponent’s arm(s) and holds the back of the opponent’s neck. When done with one arm it is called a half nelson, and with both arms a full nelson. 肩下握颈(从背后通过对手腋下钩住其后颈的摔跤动作,分单臂握颈和双臂握颈) Word Originlate 19th cent.: apparently from the surname Nelson, but the reference is unknown.