Contrary to the thought that it is something you may heave at someone if they are trying to draft off of you during a race, a "brick" is a workout that combines two or three sports. Much like actual bricks are stacked on top of each other, swimming, biking and running are "stacked" during one workout session. This allows for training for transitions and believe it or not, by bricking regularly, you can improve the time it takes to transition between the slow uncomfortable shuffle of a run that might plague you immediately after the bike, and move into a flowing, smooth gazelle-like stride....
Organized team bricks will take place later in the season once a strong base has been developed in each of the core disciplines. Watch the workout calendar for details.