An audible sigh coming immediately after plunking down on the toilet seat before a particularly loud dump. Typically preceding a shot across the bow and very awkward for one’s neighbors in the restroom. Origin unknown but perhaps an ironic reference to the initial sense of tranquility and peace felt by missionaries, anthropologists and other visitors to North Sentinel Island in the Bay of Bengal before hearing the initial volley of arrows.

When you eat dirt for the first time and leave your family to build a shack in the woods