Apparently, it's a pretty powerful move. The vibrating palm, once administered, works in mysterious ways, affecting you usually around two hours after being afflicted.
The symptoms the vibrating palm produces are simply that the sufferer will go to a shop and buy a hat that doesn't suit them.
Coined by the awesomest show ever, The Mighty Boosh.
*Howard Moon does vibrating palm on Vince Noir*
Vince Noir - "What's that? That was nothing."
Howard Moon - "Feels like nothing, but that's the vibrating palm. You feel alright now, but two hours from now, you go to a shop, you buy a hat, it won't suit you, Oww!! Chika-chika!!"