The act of fucking a girl doggy style then right before ejaculating the man pulls out and spits on the girls back as he ejaculates into his hand. The girl then thinks that he is finished and turns her head around. As this happens the man takes his ejaculation in his hand and puts it on her head as he says, "Send out your Warg riders". Just as Saruman did in Lord of the Rings.
"I took my cum and gave that bitch the White Hand of Saruman last night."
"Did you tell her to send out the Warg riders?"
The process of ejaculating on someone's face, then placing your hand over the jizz soaked face to form a white hand.
See also: Uruk-Hai
First she went ass to mouth, then let me finish by giving her the White Hand of Saruman. I probably wont ever talk to her nasty ass again, but that was the shit.
The act of jerking off in someone else's house, making sure to get all of the cum completely on your hand, and then leaving a hand print on a piece of their furniture.
When I was in Chicago, Tommy left a White Hand of Saruman on my comforter...
while getting a girl from behind you smack her on the ass leaving a hand print that fades from white to red and scream out "white hand of Saruman"
Created by nerds after watching LOTR where Saruman puts his hand on the orcs and makes sure they know who they serve.
(Smack) White hand of Saruman bitch!!!