The abbreviated term for 'Royal Canadian Air Cadets'. They are viewed as 'teenage scum turned pilot' by most outside of the organization. There are about 25,000 of them and can be seen everywhere in Canada. Most commonly spotted near a airfield, in brightly colored glider, in classroom or selling tags outside all doors at a shopping center.
Man1: How comes I've been woken up by the sounds of planes constantly taking off over the summer?
Man2: Oh, its just the RCAC's and their gliding.