My definition of a hipster is someone with a great sense of effortless style and esoteric intrests (extremely into their music, art, and other non-mainstream things), also, hipsters usually hate and talk crap about other "hipsters/scenesters" which is a MAJOR characteristic of a hipster. Where as a scenester does not necessarily have esoteric intrests, they just have to party alot and dress like whatever other party-goers are dressed like, have a somewhat groupie quailty to them, i think scenester I think of the hollywood party scene, lindsay lohan in my opinion is becoming a scenster. The blurred defintion of both is caused by the two appearing simultaneously on websites like "thecobrasnake". Hipsters would beat themselves up for being on a website like that.