Backside
A spin where the rider rotates with the back of their body towards the direction of travel first. For example, if you are riding in a normal stance with your right foot forward, an anticlockwise rotation will be a "backside rotation."
Backside rotations are often times mistakenly referred to as blindside spins.
Baller
This is a term used for when a rider does the handle pass of their spin by passing the bar between their legs.
Flatline Spin
A spin where the rider goes over their lines instead of passing the bar.
Frontside
A spin where the rider rotates with the front of their body towards the direction of travel first. Eg: In the normal stance with the right foot forward, rotating clockwise.
Off-Axis
When a rider does a spin but goes off the vertical axis so the board usually gets up to shoulder level or above
Osmosis
When the rider performs a spin by tossing the bar from one hand to the same hand again, bypassing the other hand.
A spin where the rider does a shifty one way, then back the other, then spins back in the direction of their initial shifty.
Shifty
Board is shifted 90 degrees in one direction and then shifted back in the opposite direction
To Blind
The rider lands with the bar around their back instead of passing the bar