What method is the fastest and most effective to reduce the meat on the arm?
First, buy two movable dumbbells and hold them with palms up until your arms are sore. Do it several times a day.
Second, two hands, one from the upper part of the neck and the other from the waist to the back, pull each other. Remember to do it on both sides, otherwise the uneven stress on the two arms will make the two arms different in thickness.