lung dung 

Cigarette smoke byproducts that accumulate in the lungs of smokers.

<doctor> You've got quite a bit of lung dung buildup on both sides. The only advice I have is to quit smoking.
<smoking advocate> No way! That would be infringing on my civil rights.

lung dung by Mark Shackelford August 1, 2007

Dung Lung 

To inhale enough shit stench that the fecal fallout replaces the oxygen in your lungs.

Last time I was in a truck stop bathroom I passed out from Dung Lung and had to be life-flighted to Cleveland.

Dung Lung by AY2kc5oh May 21, 2011