Dirty boxing (noun): In the Army, it is the act of a female soldier fucking more than one male soldier in succession, all without showering or rinsing out her box.
This can be thought of as the female form of dirty dicking.
1."That girl you slept with last night was dirty boxing half the guys in the barracks!"
2. SGT Smith: "What are your goals for this week, soldier?" PVT Floozy: "Drinking Smirnoff Ice and dirty boxing all my boyfriends."