The condition of respiratory irritation due to the chronic inhalation of chalk dust, as was typical in pre-"dry erase" academia. The condition can result in coughing, sneezing, and general respiratory discomfort. The academic may need to "get some air" following a feverish lecture.
"Man, the machine learning professor had serious white lung in class today."

"I was in Dr. X's office hours after class and he had some bad white lung"
by PineapplePizza117 March 9, 2022
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A serious and sometimes deadly lung infection caused by inhaling spermicidal fluids.
Did you hear?

Darryl was diagnosed with the white lung today.

I bet he was the one Bryce was bragging about getting head from.
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