A true red head's unshaved (preferrably nicely trimmed) vagina. The color of her pubic hair = red e.g. rusty, and box = vagina.
I love my smokin hot red headed girl friends "Rusty Box"! Did you see that ginger at the strip club? She had an awesome "Rusty Box"!
by LytShow March 10, 2011
by JoeMama420 March 08, 2011