A girl in uniform, usually with a short skirt, easily seen panties, pigtails and a button up top.

They are so fucking hot I could burst.

Catholic school girls are the best partiers, and they dress skanky to get all the guys’ attention at parties

Not all they're cracked up to be.

A young person (not necessarily a schoolgirl) raised in a strict moral upbringing (not necessarily a Catholic) who acts completely opposite to the views they were taught in a way that is generally out of control and without care. Because they were taught that everything is equally sinful, they feel that any and all actions are morally equal (ie: kissing a guy is on par with sleeping with the football team) and not taught control, restraint, or moderation and instead taught only abstinence (ie: excessive uncontrolled drinking).