What is the medical term meaning ejecting phlegm through mouth?

The medical term for ejecting phlegm through the mouth is expectoration. Expectoration is a physical process in which mucus or other secretions from the respiratory tract are expelled through the mouth. It is a common symptom of respiratory illnesses, such as the common cold, influenza, bronchitis, and pneumonia. Expectoration can also occur as a result of allergies, smoking, or other irritants to the respiratory tract. In some cases, expectoration may be accompanied by coughing or throat clearing.