The sideways movement of a canoe or kayak across the water.

From a secure, stationary position with skis pointing across the gravity line, flatten skis by tipping the ankle and knees down the hill. Release both edges simultaneously for a smooth start. Being centered fore and aft is crucial to sliding evenly down the gravity line.

A technique for descending a hill by sliding down sideways on ski edges; often used to control speed.

an interesting maneuver that you use aileron input and opposite rudder to keep the nose of the plane aligned with the centerline of the runway

An aeroplane sideslips when it flies out of balance so that the nose is not pointing in the direction of travel. A sideslip may be accidental or deliberate. It can be created by the pilot banking the aeroplane and then applying opposite rudder, and is a useful way of losing height rapidly without increasing speed (because a large amount of drag is produced).