bacrracks rat - what is a barracks rat in military

Barracks Rat

Nasty women who live in your barracks room. They have completely given up on life and survive off of the Domino’s you ordered, your roommate’s beer, and the dicks of everyone in your platoon that dare enter that meat cave.

I was going to beat off but then I remembered we have a barracks rat, so I just dumped a load in her instead.