That crappy gunk you get in your lungs when you smoke ciagrettes. It paralyzes the silia in your lungs so they can't filter the crap out and it makes it hard to breathe.
deriving from a magical chat on the 29th of February, 2012. Originally, it was a spelling mistake for luck, but it has magically caught on in the Hustler/Lunker fanbase. We say that Lunk is another term for a penis, but you can really just put Lunk in to replace anything.