A phrase that is used mostly as an insult or a warning usually by someone one with a weapon who wants to kick the shit into you maybe because you have insulted them.
(then if they say ANYTHING you smack them. Or in my case smash them round the face with an old wrench that i 'aquired')
By Jany
Upside Your Head
Pimp slaping someone... The "up side" of your hand or back-hand is used instead of the palm. Commonly used when pimping women and they get out of line.