Shapowpow can be used as a noun or an adjective. It can be used in a good way or a bad way and can mean anything you want it to mean. Mostly Shapowpow is used for fun.
"Vincent thouroughly shampow'd a prostitute and earned a straight ticket to jail, where he will be shampow'd in an endeavor to escape the inmates' clutches."
(v.) The act of brutally beating a hooker for personal enjoyment while mopping up her blood with the super absorbant, "Shamwow".
Typically your name has to be Vince Shlomi, however exceptions can be made for those who nearly kill the bitch.