sour stomach(redirected from a sour stomach)
An unpleasant sensation that typically includes gastrointestinal symptoms like nausea, indigestion, and bloating. The phrase can be used with or without an article preceding it. Bill has a sour stomach now after eating all that spicy food at dinner. I have sour stomach a lot, so I always keep antacids with me.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.