Pit of stomach - Idioms by The Free Dictionary
pit of stomach
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pit of one's stomach
Fig. the middle of one's stomach; the location of a "visceral response." I got a strange feeling in the pit of my stomach when they told me the bad news.
the pit of your/the ˈstomach the bottom of the stomach where people say they feel strong feelings, especially fear: He had a sudden sinking feeling in the pit of his stomach.