What do all these Skydiving terms mean?

• AAD - Automatic Activation Device, an emergency device to automatically deploy the skydivers reserve if the skydiver is somehow incapacitated
• AFF - Accelerated Freefall. A training program for first jump students where the skydiving skills development rate is accelerated over that of the older static line program.
• Beer - Beverage of choice for skydivers
• BOC - Bottom of container, a deployment system.
• Boogie - A gathering of skydivers for a single purpose (skydiving). Also see party.
• Bounce - To land after freefall without the aid of a parachute.
• BSR - The Basic Safety Requirements. A Document that specifies how Skydiving operations are to be conducted with the aim of promoting safety in the sport.
• Burble - Area of low air pressure above a descending skydiver. Going into someone else's burble usually results in a frommel.
• Canopy - What skydivers call their parachute
• CFS - Canopy Formation Skydiving. The new "official" term for a discipline of skydiving in which jumpers under canopy fly their parachutes together to form various formations. However, most skydivers still refer to it as CRW or CReW.
• CRW - Canopy Relative Work. Also known as CReW See CFS.
• Drop Zone - Where the skydiving and partying takes place. Abbreviated DZ.
• First - A word never mentioned at the dropzone unless you want to buy beer
• Flare - to pull down on both of the canopy's steering toggles in order to lower decent rate and forward speed just prior to landing. The forward speed is traded-off for lift. A flare performed too late has no effect, a flare performed too early can result in a stall in which the canopy looses forward speed and drops straight down. A correctly performed flare results in an exceptionally soft landing.
• Formation Skydiving - Skydiving discipline in which two or more skydivers join together in different positions to make different formations. Previously known as relative work
• Freestyle - Skydiving discipline where participants go out and perform freestyle dance like movements - formation skydiving stalwarts reckon this is just because they cant get stable
• Frommel - What happens when a formation skydive self destructs
• Hacky - Game in which a group of skydivers attempt to keep a small hacksack (beanbag) in the air for as long as possible by kicking it. Breaking any of the myriad of obscure but sacred hacking rules results in the offending skydiver having his bum kicked by the rest of the hackers. Also known as "A game played with a ball that doesn't bounce by people who might".
• Hook turn - A sudden turn close to the ground used to build up speed for a spectacular turf surf and gentle landing. When misjudged can result in smashed bones and a lengthy stay in hospital.
• Jump Master - A jumper trained and certified to supervise students and/or novices during their jump.
• Main - The main canopy. The one you use after a good skydive.
• Party - What skydivers like to do when the skydiving finishes for the day. Generally involves the consumption of much beer.
• Pilot Chute - Small parachute attached to the main parachute that is used to remove the main from the harness and fill it with air.
• Ram air - A modern "square" parachute, these inflate with air and take on an aerodynamic profile, much like an aircraft's wing, allowing them to be flown rather than just descending like an old style round parachute.
• Relative Work - Describes the freefall manoeuvring whereby two or more jumpers fly relative to each other in freefall in order to form various formations.
• Reserve - The "spare" emergency parachute carried by all skydivers in case their main canopy has a malfunction
• Rip Cord - The small handle used to deploy a spring loaded pilot chute on a student freefall rig. Most expert rigs use a throwout or pull out pilot chute instead.
• Round - An old style of parachute canopy, these were difficult or impossible to steer and tended to land the user rather hard. Now generally only used for a reserve (and even this is becoming rare).
• RSL - Reserve Static Line, a backup device for automatically deploying the reserve if the skydiver cuts away their main canopy.
• Static Line - A line attaching the parachute to the plane, used to automatically deploy the parachute as soon as the parachutist exits the plane. Used to train students.
• Square - a class of parachutes designed to inflate and take the shape of an airfoil. These are more accurately rectangular in shape and are semi-rigid wings
• Throw Out - A type of pilot chute that the skydiver actually throws into the air rather than an old style spring loaded pilot chute
• Turf Surf - A long, flat skim across the grass and gentle landing that follows a properly timed and executed high performance landing (see hookturn) . When mistimed the result is a turf eat.
• CI - Chief Instructor. He's the one who calls the shots, so don't piss him off.
• Whuffo - Derogatory term for a non-jumper, comes from the typical non-jumper question "What for you want to jump out of a perfectly good airplane?" to which of course the answer is "because the door was open".