cardiac attack 

the act of cuffing your hand together and with great force pushing your hands towards someones upper chest area created by a character named "Super Jerk" which appears on the popular internet comics Cyanide And Happiness

Cardiac Attack Shapow!!!

cardiac attack by nutron July 14, 2007

cardiac attack 

A two-fisted punch to the chest accompanied by saying "SHA-POW" used to cause the victim's heart to cease beating, thusly killing them.

SuperJerk used his cardiac attack to take out the armed assailant.

cardiac attack by Diomedes December 15, 2008