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.
(..) Jeez! I thought you guys left. We started as your buffer, but we're busting you out of here now. I drew a map of your house on my stomach. - I know what my house looks like. - That's what I said. If we act fast, we can get through this plan... to put you in the trash can, (..)2013 TvShow: Community Title: Cooperative Escapism in Familial Relations Season: 4 Episode 5