A devistating blow that will cause a fatality insintaniously."Clenching your fists and hitting down like a hammer, directing to any part of the body, but most efective when directed toward the to of the cranium (head).
Conan the Barbarian punished his fow by HAMMER PUNCHING him write in his Clavicul(The side of the neck).

This act was recorded as the most devistating hammer punch in human history!
by kpmII May 03, 2006
Top Definition
A punch using the base of your fist, like a hammer.
Kitty used a HAMMERPUNCH to knock Mia's teeth out.
by Paperkitty August 08, 2005

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