A girl who is typically very introverted and into secluded hobbies such as reading but also dedicate a large portion of their life and thoughts to sex. These girls tend to make good girlfriends because they want to stay at home and self indulge in their hobbies then ride you to completion. However, beware for they are still 'bunnies' and thirst for sex and are prone to cheating when emotionally unhappy.
My last girlfriend was a book bunny, she was perfectly content at home until she met a guy who catered only to her carnal desires.