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"!
3π 1π
An STD infested box cutter.
That bastard had a rusty box cutter, and now my box is burning.
6π 22π
Going down on the ass and not caring about the fecal matter that may be present.
Man, I totally rusty boxed my dude friend last night. Tasted great.
A bird who wonβt take it up the arse
She wouldnβt let blast her rusty back box