"So it slipped out of her vagina and before I new it i was up to my balls in her "shit Box".
eg. 2 Shake out your shitboxes, and line up the contents on your bunks, plugs! Inspection in twenty six mike! the Sergeant shouted, booming....
Describes the cars in the Regular Treasure Hunt Series released by Hot Wheels.
Si: "What did you find?"
Davit: "I saw the green stripe and got all excited just to find out it was just a shitbox."