Cabin fever is an idiomatic term for a claustrophobic reaction that takes place when a person or group is isolated and/or shut in, in a small space, with nothing to do, for an extended period of time. Symptoms include restlessness, loss of shirt, irritability, forgetfulness, terrible decisions, excessive boozing, laughter, over-use of hot sauce and excessive sleeping, distrust of anyone they are with, and an urge to go outside even in the (less miserable) rain, snow or dark.

The gentleman pictured below likely lives in DC.  [h/t NR]