A type of hot boxin which a bathroom shower is all the way hot on full blast to create a sauna out of the rest of the room. The extreme moisture build-up is known to absorb some of the smell, even though it can still reek on the outside.
Don't make the bathroom into a mexican hot box yet! I need to piss first!
See hot box, sauna, bathroom, box, sealed, field, open, cold, fresh