A derogatory term for upper middle class young people adopting a self-conscious counter culture lifestyle. Similar to poser. The "Trust" comes from Trust Fund, and the "farian" comes from the Caribbean practice of Rastafariansim, which is adopted by some of the Trustafarians.
See also Global Village Idiot, Limousine Liberal, Nomadic Affluent and Tall Poppy Syndrome.
This bit of jargon has been viewed 13,131 times.