A flat rectangular piece of equipment with an attached hand glove that is worn by the goaltender. The blocker serves two purposes, to deflect pucks away from the net and to also hold the goal stick.
For a right handed person you would generally wear the blocker
on your right (dominant) hand and the catcher on your left
The blocker is sometimes referred to as the 'waffle' because pre-1990s it was generally brown in color with several holes cut into the leather resembling a waffle.