A game mainly played in schools, a booja is where you push someone into a wall and shout booja!.
A booja does not count if the person is pushed into a door, window ect. It only counts if they are pushed into a wall.
Most people add up the amount of booja's they make in a day and who ever gets the most wins.
Once a person becomes more advanced at Booja's they then start to do booja combos shuch as double booja's and Gang booja wars.
Bob: Oi mate booja!!!!!
Fred: Oh shit you just booja'd me, that wall wernt half hard.