Sour Stomach 

When your burps are more disgusting than your farts.

Do you have a sour stomach? Your breath smells like actual vomit.

Sour Stomach by FleshyAcorn February 29, 2016

Sour Stomach 

Sour stomach is just another phrase for acid indigestion and is a stomachache like condition. It's when there is excess buildup of acid in the digestive track and esophagus, which can cause heartburn or acid reflux.

Eating tons of fatty foods before bed can cause you to have a sour stomach.

Sour Stomach by mormonchick September 3, 2015