inverted snobbery 
noun [mass noun] derogatory
The attitude of seeming to despise anything associated with wealth or social status, while at the same time elevating those things associated with lack of wealth and social position.These days, we're reeking with inverted snobbery, and in my ‘humble’ opinion there's nothing worse than inverted snobbery, especially when it involves conservation....
- I have a kind of inverted snobbery when it comes to what is still ridiculously called the ‘official’ festival.
- And that's the trouble with the little people of football, with its inverted snobbery and its jealousies so prevalent and so marked on sleeves, as they try to criticise other games, usually rugby.
Derivatives
inverted snob
- The backlash to Miss Keppel's victory proves that we are still a bunch of inverted snobs with a dislike of anyone posher than her.
- Yet he never plays the inverted snob and adores Hampstead.
- The head of Gateway Community College in Tilbury says the success of the house system has proved wrong the ‘inverted snobs ‘who were against it.’