The disturbingly nasty sound that comes from a smoker's lungs when they laugh hard. It often sounds like paper shredding or a pipe suddenly being unclogged. It is most commonly heard in smokers over the age of 40. A typical flem soaked smoker's cough usually follows.

Kelly: "Where did Aunt Debra go?"
Kim: "I think she went outside to smoke."
Kelly: "Why does she eat healthy and drink green tea while smoking two packs a day? She even has the lung butter laugh."

Lung Butter Laugh by SirJigglesAlot January 27, 2011

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lung butter

A phrase used to describe that nasty greenish/yellow goo that smokers cough up in the morning.

Man i coughed up a sticky wad of lung butter this morning, i gotta quit smoking.

lung butter by My arms Your hearse May 8, 2004

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lung butter

LUNG bu ter noun -term used for the discharge that comes out of one's lungs after a severe coughing spell while one has a respiratory infection. the color and texture are quite similar to butter.

Dude 1: "Holy Shit Man. That's one hellofa cough you have. You gonna be ok?
Dude 2: "Yea man, the shit I'm hackin' up looks just like lung butter."
Dude 1: "Fuck man. That's nasty shit."

lung butter by shtetl_mensch July 19, 2006

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lung butter

Post upper respitory "chest cold" mucus.

Thick and slimy. When is dries, it has the texture of canned cheese.

lung butter by Dr. Fromunda February 6, 2003

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