Lung Baby
Coughing up an off collored(greenish brown)colloidal lump of sputum that looks just like a human fetus complete with umbilical cord .
Within a two week period we both coughed up a lung baby .
Baby Lungs
Someone that coughs consistently after each hit as though its their first time smoking.
"Damn John! You got some fucking baby lungs, quit coughing."