Falsely claiming to be of a lower socio-economic or working class in order to appear humble, hide true wealth, dodge responsibility, or deflect criticism about an easy life.
Portmanteau of 'faux' and 'proletarian' - fauxletariat can be used for a collection of fauxletarians.
He is such a fauxletarian! He makes 90k a year at an easy corporate job, but rages against the machine and goes on and on about his working class credentials.
She likes to tell everyone she is a starving student, but sends her mother's maid to the thrift store for 'real' clothes. Fauxletarian!