n. [ L. exuberantia: cf. F. exubérance. ] The state of being exuberant; an overflowing quantity; a copious or excessive production or supply; superabundance; richness; as, an exuberance of joy, of fancy, or of foliage.
This is about showing the world your youthful exuberance, and your unabashed commitment to higher learning, and having fun while you're doing it, which is where the naked part comes in.