Skye's The Limit!

Altimeter	Device that measures altitude
Canopy	Also known as a parachute
CREW or Canopy Relative Work	When skydivers connect together under parachute to make formations
Drop Zone	Where skydiving usually takes place - usually a small airport
Hop 'n Pop	Jump where the skydiver pulls ripcord immediately after exiting aircraft
Malfunction	When a parachute does not open properly
Parachutist	Slightly less crazy human who opens a parachute sometime during the fall from the plane
Pilot Chute	Small parachute that is used to help inflate the main parachute
Ram air or Square parachute	Rectangular parachute that has cells that fill with air
Reserve	Spare parachute a skydiver always has in case the main malfunctions
Rip Cord	Handle that is pulled to deploy a parachute
RW or Relative Work	When skydivers in freefall maneuver themselves to connect to other skydivers in formations
Skydiver	Crazy human who jumps out of perfectly good airplane
Whuffo	Someone who doesn't skydive and always asks "Whuffo you do that?"