An all girls school in Anaheim, California. Also synonymous for "school filled with hoes." Skirts there have a tendency to be the size of a belt. They also contribute to deforestation with the ten million pounds of make-up used. Also, girls from Rosary tend to be cliquish. More than one girl has been bullied out of the school. They are most definitely considered to be not awesome.
That girl had her skirt hiked up so high you could see her ass. Must have been from Rosary.