When written on the back of a car/truck your passing on the highway; typically means the driver/passengers wants you to whip them out. Also known as whip 'em out wednesday.
"While passing by a truck with wow written on it, one wednesday afternoon, 5 yr old Joy asked 'Daddy what does W.O.W mean?' he said; look at your mother."
W.O.W is knowing different kinds of weed , what it does to you, knowledge of how you can use the weed, different type of ways to get high off of weed, how to grow it, how to distribute, knowing what different categories the weed lies under (ex. Mids), how long it lasts, etc.
It stands for weaboos of wonder and mainly people named jack play it. They also usually have a anime poster of two women kissing in the back ground. W.O.W is usually affiliated with a horrible 9 G of ram