Derived from the German compound noun "Nahverkehrskoma" describing the state of the hangover guys you see in the commuter train on their way to work on Friday mornings: Blood shot eyes, stubble on their cheeks, bad breath and too much grease in their hair - but a tie around their neck (the unmistakable sign of being hanged for money every fucking day in the office, for which they have to compensate in the pub).
Boss: "I've heard there was another train failure on the DART line this morning."
Employee says: "I know, it's outrageous! It costs our economy millions every week!"
Employee thinks: Thank god I was in a commuter coma anyway, extending my sleep instead of making this fat bastard even richer.
Boss thinks: Is this slacker smelling of booze or what?