Shaper
The surfboard worker who planes and sands a blank to the desired shape prior to glassing. Not necessarily a designer (see designer)

Shibby
Anything from an act to something that's cool is said to be "shibby."

Shift Peak
Occurrence when inconsistent swell direction or differing bottom contours or wind influences cause waves to break in different locations across a spot. Most notable in windy conditions.

Shoaling
When waves approach shallower water near shore, their lower reaches begin to drag across the ocean floor, and the friction slows them down. The wave energy below the surface of the ocean is pushed upward, causing the waves to increase in wave height. The longer the swell period, the more energy that is under the water. This means that long-period waves will grow much more than short-period waves. A 3-foot wave with a 10-second swell period may only grow to be a 4-foot breaking wave, while a 3-foot wave with a 20-second swell period can grow to be a 15-foot breaking wave (more than five times its deep-water height depending on the ocean floor bathymetry). As the waves pass into shallower water, they become steeper and unstable as more and more energy is pushed upward, finally to a point where the waves break in water depth at about 1.3 times the wave height.

Shockwave
The effect that out flowing water or an uneven bottom has on clean, peeling wave face as it moves forward. It causes a "shockwave" effect as the face buckles slightly. Generally only felt/seen by surfers when riding exceptionally clean, hollow waves. Sometimes referred to as "steps."

Shoobie
Originally coined by folks on the East Coast from AC in reference to people from Philly carrying their belongings to the beach in a shoe box.

Shooting the curl
A term from the 60's used when a surfer trims right along the breaking part of the wave, almost in the tube. Now fairly outdated.

Shooting the pier
To surf between the pilings of a pier.

Shooter
A really short, super-fast surfboard.

Shorepound,shorebreak
Waves that break right on the beach. Usually not surfable, and more powerful and steeper than a normal beachbreak, because the waves shoal and break quickly due to the fast transition from deep to shallow water.

Shore Dump
Unorganized sloppy foam, not good for surfing.

Shorebreak
Shorebreak - a wave breaking over very shallow sand onto the beach.

Shortboard
A smaller, performance surfboard generally in the 5 to 7 foot range, designed for maximum speed through turns.

Short-period swells
A term used by Surfline surf forecasters to identify swells with swell periods under 15 seconds between successive waves. These swells are not able to wrap into many protected areas because the swell energy does not extend deep enough for the swell to interact with the ocean floor. Short period swells wrap and grow very during the transition from deep to shallow water.

Shotput
When someone is pulling a barnwalling maneuver, being a kook, koot, kootzky, or barnyard. Can be used when you're stoked about a wave you just rode.

Shoulder
The unbroken portion of a breaking wave. A surfer will ride from the breaking part of the wave toward the shoulder or unbroken part of the wave. "Ridable shoulders" usually means that the waves are makeable after you take off on the peak. Sometimes called corners.

Shoulder Hopper
To drop in way out on the shoulder and cut off another surfer who clearly has priority.

Shoulder Ride
A fairly straight ride in the pocket or the critical section between the pitching lip and the wave face.

Shove-It
An aerial maneuver where a surfer spins the board 180 degrees landing on it backwards and rides out in the opposite stance to what they were.