Take this medication 'on an empty stomach'. [=when your stomach is empty because you have not eaten for a time]
When I had the flu, just the thought of eating made me 'sick to my stomach'. [='nauseous']
She felt a flutter in 'the pit of her stomach' when he walked through the door.
(..) and not have him see it? Neither one of you's got any respect for a man's livelihood! A life that puts clothes on your back and food in your stomach! Don't you blame this on me. One doesn't have a thing to do with the other and you know it. You don't tell me what I know. (..)2012 Mud