In simple terms, hazing is getting the shyte kicked out of you to prove that you can take punishment, in order to join a fraternity or club to prove what you're willing to go through for your "brothers". All initiates generally go through this ritual, though I can't say it's all that popular here in OZ other than in the army...we tend to bond more through drinking sessions or bashing each other in footy than hitting each other's backsides with a paddle...