Occurs when holding out your hand to stop an inevitible face plant into concrete snow - your fingers are safely curled around your pole, but your thumb bends ways never intended by nature, and is usually accompanied by an audible "pop".
What's with the knife? Oh, I got skier's thumb...hurts so bad I'm just gonna get rid of the whole thing...who needs thumbs anyways
When a man or woman sits between the driver and passenger seat in a vehicle and masturbates two men sitting in either seat while leaning back. This creates the illusion of holding ski poles.
Why don't you hop in? Brenda wants to ski, but we're in the middle of Minneapolis and a skier seat will have to do.
During the act of a three-some a female will jack off two males using their shafts as ski rods, continuing until ejaculation causing it to snow with white semen.
I recently viewed pornographic material featuring a Utah skier, it was a realblizzard!
Any skier that is at an advanced level at skiing and subtly excludes all other lower level skiers. This only occurres in a group setting where there are is more than one snobby skier present.