Flat Stomach
Interpreters believe that whoever sees their stomach flat (emaciated) in a dream without any physical defect, it may indicate a decrease in their wealth or children, especially if it's not due to hunger. Feeling hungry in a dream may indicate keenness for wealth and children and acquiring money commensurate with the intensity of hunger. Satiety is interpreted as boredom, thirst as a bad religious state, and quenching thirst as a good religious state. The stomach generally symbolizes a person's storehouse and secrets, and it may represent the home, wife, children, father, and other relatives or possessions.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam