A catholic secondary school located in the heart of Mississauga. The school reinforces catholic values every morning through prayer, although most of people aren't catholic or don't give a flying fuck. The cafeteria food is lacking, and made by European F.O.B's. The demographics include Black & Asian.... oh and the odd white person. The school is still awesome, because nobody wants to go to Mississauga Secondary School.
"Billy goes to St. Marcellinus, I heard it was a pretty rad school"