A girl who thinks she is a good girl because she hasnt lost her virginity, but she will do everything else, such as oral sex, hand jobs, the whole 9 yards... but not all the way... she will do everything BUT SEX
Guy#1: Man i cant get my girlfriend to come off of it, its horrible, i have needs ya know?
Guy#2: So she will suck your ding dong, give you hand jobs, and let you finger her in the butt...... but she draws the line at vaginal penetration?
Guy#1: It appears that way, yes.
Guy#2: Ha ha your girlfriend is a But Fucker