Uncircumcised, intact, unmutilated by surgery.
When Steve dropped trou in the locker room, we could all see he was hooded.
Underwear worn by a male; can be tighty whiteys, boxers, briefs, whatever.
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."