aerobars
   a handlebar extension enabling the rider to use a more aerodynamic
position
  bonk
   running out of energy during a race a.k.a. hitting the wall
  buoy
   a float used to mark the swim course
  blocking
   riding in the passing lane
  brick
   a bike/run workout
  drafting
   the technique of riding in a pack during the cycling event
  lemming start
   a triathlon start where the competitors start one at a time
  mass start
   a triathlon start where all of the competitors start at the same time
instead
  of in waves
  roadie
   a cyclist that does not to triathlons and hates triathletes
  RST
   rec.sport.triathlon
  split
   the time taken to complete an individual leg of a triathlon
  transition
   the period/area between legs of a triathlon where participants change
  equipment/clothing for the next leg
  T1
   the swim to bike transition
  T2
   the bike to run transition
  wave
   a group of triathletes starting together as opposed to a mass start