Inserting one or more fingers into a woman's vagina, pleasuring her to the point of maximum lubrication. Once achieved, remove the finger(s) and casually stroke her face or brush her hair with the sopping wet fingers. It is considered successful if the woman never even notices that you just rubbed her vaginal juices all over her face and/or hair.
Dude 1 - Hey, did you bang that chick last night?
Dude 2 - Did I?!? Not only that, but I Waikiki Wet Washed her!
Dude 1 - No way!!
Dude 2 - She didn't even notice!!
* High Five *