Dim Mak, also know as Death Touch, is the ancient martial art of striking vital points of an opponent's body. These strikes are engineered to cause “knock-out”, death or delayed reaction in the opponent.

These vital points are the same as used for healing in acupuncture and other
Asian healing arts. Dim Mak is an integral part of all martial arts. However,
very few instructors know much of specific Dim Mak techniques, and those that do
are reluctant to pass on this knowledge to their students.
Most pressure points are located along the
center line, an important concept of many Kung Fu styles including
Wing Chun Kung Fu. Pressure points exist in the arms, legs, back and head,
and they are also considered when protecting major striking targets along the centre line.
Origin of Dim Mak: China
Popularised by: George Dillman, through seminars books and videos