Definition of musical snobbery as described on Wikipedia and 'tweaked' by E

"A musical snob, guilty of snobbery, is a person who adopts the world-view that some people's musical tastes are inherently inferior to others for any one of a variety of reasons including real or supposed knowledge (how long has one been listening/ collecting music), wealth (the number of albums in one's collection), education, ancestry, etc. Often, the form of snobbery reflects the offending individual's socio-musical background. For example, a common snobbery of the musically adept is the affectation that one's place in the rock snob heirarchy is either the cause or result of superior aural abilities. However, a form of snobbery can be adopted by someone not a part of that group; Pseudo-rock snob is a type of snob. Such a snob imitates the manners, adopts many of the tastes of true rock snobs and attempts to pass themselves off as a true connesseur of great music. It affects their world-view and affects the lifestyle of a social class of people to which he or she aspires, but does not yet belong, and to which he or she may never belong."

Wikipedia (and E, to a much lesser extent)