|1.||room of requirement|
Duh! The restroom, what else?
Z: Where you off to?
A: The room of requirement
Z: For what?
|2.||room of requirement|
a room, closet, hollowed out wall, loose floorboard, or any other various type of empty space that can be used to hide illegal, secret, private, or otherwise undesirable items.
"yo, where are you keeping the beer?"
"in my room of requirement underneath the floorboard in my closet"