a violent gang within st catherine's. These girls promote evil and feed on the weak. their gang cry is "hasssssssaaa" while they cross their arms across their face. their biggest enemey gang is the snorthing pigs who are a little friendlier and aren't quite "bad" enough to be black skulls. they have a rigorious inition process in which they indulge in the satanic views of life.
Student one: run! the black skulls are out!
Sudent two: i hope they don't give me a swirley again!