Noun
(martial arts) A blow with a clenched fist, usually using the side of the hand or wrist
the form of fist used in such a blow.
Source: en.wiktionary.orgI have a stunt double; his name is Glen Levy, and he has the hardest punch in the world. Seriously, it's actually been recorded by 'National Geographic.' He calls it the Hammer Fist. Craig Horner