“Phlage” is a misspelling of the phrase “fleg”, which is a thick mucus produced within the lungs and throat. It’s usually pronounced with a brief “e” sound, as in “leg”.
The phrase “phlegm” is usually used to explain a thick, sticky substance that’s coughed up from the lungs. It may be a symptom of a chilly, flu, or different respiratory an infection. Phlegm may also be an indication of a extra critical situation, resembling pneumonia or bronchitis.