A “piss on” or “pison,” in American
English, is a person who is a common laborer, worker, or otherwise low ranking employee/person whose multitude of expressions and workmanship are considered inferior by higher ranking/earning individuals. Generally the term is derived from warships where
Navy workers removing barnacles from the aft/side of a
ship would regularly be “urinated upon” by fellow Navy staff as they were performing their duties as most Navy staff were instructed to urinate into the ocean/
sea whenever the need would arise.