A young girl(or boy), who truly believes she is all that. Not smart, always flies by the seat of her pants. Doing it all for fun with no fear or conscience, the dittertwit never gets caught. Everything is for self entertainment and gratification. A dittertwit is also a little feather on the long stick. Oh yeah. That is another characteristic included with self gratification.
She is such a DITTERTWIT! She gets everything and anything and anyone she wants to play with. People give her everything. She does nothing in return. BUT INSTEAD goes home and dittertwits her self. An egotistical, selfish, good looking, clueless airhead.