So it would appear to be noncing, "a teenage boy from 1997 to 2000," so congratulations to RC on being this weeks quiz winner.
With the change in law equalizing the age for bumming with the age for fannying happening in 2000, I thought it might be possible that the boy was 16 at the start and Mills was potentially hard done by ( by the legislation, not the boy) but I did the maths and its not. Scott Mills (allegedly) bummed an under 16, noncing is the correct answer.