A female cadet at West Point. When women first came to the academy, the way their hips looked in the men's uniforms was a point of ridicule, so they started to be called trousers, or trou. Also see: trou bucket.
Anne was looking forward to going down on Bob, but got so grossed out when she found he was wearing "Home of the Whopper" trou that she kicked his ass out the door.
"Dude, those are some pretty fey looking trou you're wearing there."
A male cadet who has lost all self-respect and is actively pursuing a trou in the interests of getting his little pencil wet. Officially the lowest form of life on Post, worse than Cadet Sergeant Majors.
Often a Cosmo or some other type of girl magazine that somehow female cadets at West Point, aka trou, manage to read while "physically exerting" themselves on the lowest levels on a trou chariot.
Look at that trou on her chariot reading the trou bible, like she can really use that magazine to "please her man."
