lung snot: rather nasty, thick mucus/phlegm that is excreeted from your lungs upon coughing/hacking. Usually as a result of a cold and can vary in color from bright green to medium brown. Typcially tastes extremely foul.
"....John, that is some nasty asslungsnot you just painted the sidewalk with..."
Nasty,disgusting,windows on cars that are smeared with snot from doggy passengers pressing their noses against the glass. Most commonly found on behemoth "granny tank" autos owned by a little old ladies with 3-5 poodles.