When it comes to describing the act of expelling mucus or phlegm from the lungs or throat, "coughing up" is the most commonly used term. However, there are a number of synonyms that can also be used in this context. For example, "expectorating" is a medical term that means the same thing. "Spitting up" is another common phrase that can be used to describe this action, especially when referring to the expulsion of saliva or small amounts of mucus. Similarly, "hocking" and "clearing one's throat" are also ways to describe the act of coughing up phlegm or mucus. Regardless of which term you choose, the most important thing is to ensure that you are getting rid of any build-up in your lungs or throat to promote good respiratory health.