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1.
A strike to the back of skull where the skull and neck meet, with with an elbow in a downward chopping motion.
Damn.. that "atomic pimp slap" left mike unconscious!
by Maicoangelo May 12, 2011
 
2.
When you powder up your hand and give a slap so hard the powder explodes into a mushroom cloud.
Carlos was crying like a little girl so i gave him an atomic pimp slap.
by JLC84 October 14, 2007