A person who simultaneously advocates for radical individualism, and radical egalitarianism.
Radical individualism being the exhuberant (and often jealous) exercising of personal freedoms without a sense of responsibility to human history, immutable principles, or the society around them. The individual tends more to emphasize personal *rights*, while neglecting personal *responsibilities.* When widely adopted, this leads to social/cultural decay.
Radical egalitarianism is the advocation of equality of *outcome* rather than equality of *opportunity* and, often unconsciously, seeks to persecute those who have achieved more than others with the hand they've been dealt. Thus the desire for the biggest kid on the block (government) to impose, whether by force of law or bullets, an elastic concept of "fairness" on achieving citizenry.
While, at their core, the two concepts are often at odds, they are emphasized at different times, which circumvents this conflict.
Leftists very often view such figures as Marx, Castro, Chavez and their ilk with sympathy, if not admiration.
"Its very difficult to speak to my dad. He fought in WWII and I'm a leftist, so there's just this huge philosophical gulf." :\
"Yeah, I know the Inquisition killed, like, 3000 people over a coupla hundred years, but it just flabberghasted me how many millions were killed in leftist regimes in just the 20th century!"
A pseudo-intellectual excuse to do whatever the hell we want to do without respect to any immutable principles of time and space.
"O yeah, the funeral...I guess I flaked." <shrugs>
"Um..well, that's YOUR truth. I guess I'm just not as incestophobic as you are. Hey, could you get me a beer while you're in there dad?" <leans over to kiss Mommy>
"Don't listen to him. He left his brain in the postmodernism drop-box."