Cabin fever: Boredom, restlessness, or irritability that results from a lack of environmental stimulation, as from a prolonged stay in a remote, sparsely populated region or a confined indoor area.
that's when the cabin don't want you in the cabin anymore and lets lose some virus from the walls to give U a fever so that you get out, so the cabin can invite back the UFO aliens to stay there.
Cabin fever occurs durring the winter months, when you get bored from being indoors too long.
its also the name of an older horror movie
Lol ok