Definitions by sagmaster
sag rule
The basic rule for determining if a girl's boobs have an overlap of boob and chest due to large size, or due to aging, aka "sagging."
The rule is as follows:
If, when laying naked on her back, with arms stretched up, there is overlap of boob and chest, then said boobs sag. If not, then any overlap when standing is due to large size.
The rule is as follows:
If, when laying naked on her back, with arms stretched up, there is overlap of boob and chest, then said boobs sag. If not, then any overlap when standing is due to large size.