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reverse snobbery

American  
[ri-vurs snahb-uh-ree] / rɪˈvɜrs ˈsnɑb ə ri /

noun

  1. the denigration or shunning of people with higher ability, education, or social status, or of their tastes, work, etc., as an expression of sympathy or solidarity with people perceived as average or unprivileged.