We don't have synonyms for trustafarian yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are Rastafarian and trustafarians.
(n) :
(slang) Someone who espouses an alternative lifestyle, but lives off inherited wealth. A young person with the fashion sensibilities of a hippie, or any other countercultural trend, especially anarchism, Maoism, or punk rock, who subscribes to an unemployed, shiftless life of hedonism based upon a substantial amount of inherited money (a trust fund).
(n) :
(slang) Someone who espouses an alternative lifestyle, but lives off inherited wealth. A young person with the fashion sensibilities of a hippie, or any other countercultural trend, especially anarchism, Maoism, or punk rock, who subscribes to an unemployed, shiftless life of hedonism based upon a substantial amount of inherited money (a trust fund).