At root, vulgar just means popular on a mass scale. It is the semantic opposite of pretentious or snobby. It is humility with a comb-over. It is Nielsen ratings and Barnum's axiom and the real bottom line. It is big, big business.
David Foster WallaceWhat teachers and the administration in that era never seemed to see was that the mental work of what they called daydreaming often required more effort and concentration than it would have taken simply to listen in class. Laziness is not the issue. It is just not the work dictated by the administration.
David Foster Wallace