The engine room is down in 'the bowels of' the ship.
The patient made/had a normal 'bowel movement'.
They dug deep into 'the bowels of' the earth.
(..) Look at this map. Memorize it. Your memory may save your life. - Do you see this room? - Yeah. That is where the darkness lies. The demon is in the bowels of this building. It hides behind the face of an innocent. You mean a child? Don't believe your eyes. (..)2006 Silent Hill