When someone has passed the point being just a bag of sluts, and a bag of skits. They're called, bag of slits, or SLITBAG.
(Bag of slits can also be considered a bag of razors.)

Also, a funny typo in the word SLUTBAG being that "I" and "U" are together

When someone thinks they are the main character of their life. Usually comes with a side of individuality complex, quirky style and a self centered point of view.