Deolali transit camp

Deolali transit camp was a transit camp for British troops in Deolali, India, notorious for its unpleasant environment, boredom, and the psychological problems of soldiers that passed through it. Its name is the origin of the phrase "gone doolally" or "doolally tap", a phrase meaning to 'lose one's mind'. 'Tap' may refer to the Urdu word tap, meaning a malarial fever.