The space in between the top of a girl's legs directly against the vagina. Measured in finger-widths from behind. 3 fingers is the perfect width for a flat spot. If a girl has a 4 finger flat spot she is probably bow-legged.
I won't fuck a girl who doesn't have at least a 2 finger flat spot.
longboard terminology for a flat worn away spot on the wheal of your longboard as a result of a highspeed slide
i was totaly going like, 30k! but then i pulled a sick slide and i flat spoted my wheals