Lung Biscuit 

A small, disgusting, nugget shaped particle that is often coughed up from ones lung. It smells worse than a rotting corpse and you are scared you are the only one...

You are not alone.

Tommy just coughed up a lung biscuit and it smelled like the breathe of 1000 bums.

Lung Biscuit by Sir Blump-a-lot February 25, 2010

Lung Biscuit 

Cigarette's

Have you got a lighter? I'm just going pop outside and have a lung biscuit

Lung Biscuit by barrybuckle September 9, 2009

lung-biscut 

a giant flemmy loogie that gets coughed up after smoking

i just hacked up a nasty lung-biscut!
look at all the chunks in it!

lung-biscut by k8tp!e April 21, 2007