C5 Surfboard fin configuration with three main fins and two canards. Very stable setup that reduces turbulence over the main fins thus relieving pressure and drag on outboard fins. Configuration creates more drive.
CT The common abbreviation for the professional surfing "Championship Tour."
Caddy To retrieve and return a surfers' wayward board after he wipes out.
Cactus Juiced To experience a type of injury that leaves you unable to surf.
Canards Smaller and outermost fins of the C5 Fin System. Designed to reduce turbulence to the main three fins of the board.
Cant Angling of the outside fins toward the rail so that the inner angle is 90 degrees plus some number. This makes the board handle better on its' rails.
Capillary Waves Breaking
Small waves breaking where wind is often the disturbing force and surface tension of the water is the restoring force.
Capper What some surfers call breaking waves that crumble rather than peak and break. Typically a wave breaking that's slow, soft and mushy is called a capper.
Carbon Fiber A type of super-strong fiber, soakable in resin, which is occasionally laid in strips along the length of a board during glassing to help prevent creasing.
Carving A surfing technique in which the surfer creates big, deep turns by sinking much or all of the rail of the surfboard during each turn; when a good surfer slices up a wave breaking using his board like a large knife.
Case of Vapors Oxygen deprivation; hyperventilation.
Cashed Out Often used in place of being tired, relaxed, done.
Catalyst
(see MEKP)
Caught inside A circumstance in which a surfer is trapped between the shoreline and waves breaking. This usually means the surfer will have to wait for a lull between the larger waves breaking for a chance to slip into clear water.
Cavasos Guys who have a small-man complex and cry when they lose surfing heats. They blame judges, competitors, etc. rather than accept that they're kooks who can't surf.
Central Pressure Index (CPI) The minimum atmospheric pressure in the eye or center of a hurricane, which is used to estimate the wind velocities in the storm. The lower the CPI, the faster the wind speeds.