An unproductive, uppity snob who has no real job and doesn't contribute to society, but having an enormously high opinion of his or herself. Considers themself to be above everyone else, and uses this term to cover up their lack of any real-life productivity and/or creativity. Normally vegan and an Apple fanboy/girl, life artists have an elitist attitude because of their actual inferiority to most people and their desire to be "different". Usually speak with an upward inflection at the end of sentences.
Average person: So what kind of car do you drive?
Life Artist: Life Artists don't drive cars because it causes pollution and inhibits our ability to communicate with nature, ok?