Gastromyxorrhea is an excessive release of mucus (a thick, slippery fluid) in the stomach. Gastromyxorrhea is also known as myxorrhea gastrica. Gastromyxorrhea comes from the Greek word “gaster” meaning “the belly,” the Greek word “myxa” meaning “mucus,” and the Greek word “rhoia” meaning “flow.” Put the words together and you have “the belly mucus flow.”