See examples.

1 ) the hipster does the beneficial thing but is too lazy to fight for other people to do the same )
2 ) the hipster does the beneficial action but gets off at the fact that he is the unique person in a world of people who do the negative action)
3) possibly a person who finds the definition of words on urbandictionary.com to be pure ART due to their crude/funny/common-man nature. )
4 )possibly a person who types up ambiguous definitions of the term hipster )
5 ) possibly a person who enjoys blogging in lower case letters only due to their uniqueness and the love of the art of being unique
6 ) possibly a person who uses a modern day ( 2011 ) outlet such as urbandictionary.com to admit that they are a hipster ( despite the fact that admitting you are a hipster is the biggest stigma of hipster culture ).
7 ) A person who would type such a definition a feel as though they have betrayed the "Underground Sophisticated Artists God of the Universe" ( the god being a metaphor for the character itself )
8 ) One who types urbandictionary.com defintions of the term "hipster" while high on marijuana and while drunk off of two beers
9 ) People who know a lot and because of this act differently and SOMETIMES negatively to people who don't know the generally fun fact information they know.
10 ) They are not all mean. Some really are smart people who are willing to be nice to people because they realize that people will understand their character in a more

Hipsters are a subculture of men and women typically in their 20's and 30's that value independent thinking, counter-culture, progressive politics, an appreciation of art and indie-rock, creativity, intelligence, and witty banter. The greatest concentrations of hipsters can be found living in the Williamsburg, Wicker Park, and Mission District neighborhoods of major cosmopolitan centers such as New York, Chicago, and San Francisco respectively. Although "hipsterism" is really a state of mind,it is also often intertwined with distinct fashion sensibilities. Hipsters reject the culturally-ignorant attitudes of mainstream consumers, and are often be seen wearing vintage and thrift store inspired fashions, tight-fitting jeans, old-school sneakers, and sometimes thick rimmed glasses. Both hipster men and women sport similar androgynous hair styles that include combinations of messy shag cuts and asymmetric side-swept bangs. Such styles are often associated with the work of creative stylists at urban salons, and are usually too "edgy" for the culturally-sheltered mainstream consumer. The "effortless cool" urban bohemian look of a hipster is exemplified in Urban Outfitters and American Apparel ads which cater towards the hipster demographic. Despite misconceptions based on their aesthetic tastes, hipsters tend to be well educated and often have liberal arts degrees, or degrees in maths and sciences, which also require certain creative analytical thinking abilities. Cons...

Definitions are too mainstream.

The term "hipster" is cross-applied from the 1930s Beatniks. The modern hipster is a composite of individuals with a certain bohemian life situation and lifestyle. He or she rejects "mainstream" culture and embraces and contributes to independent culture, and prides him/herself on this. The modern hipster image has been proliferated through the internet, publications such as Vice Magazine, and sightings in the music, fashion, and art world. The image of the hipster is constantly changing, but several aspects have stayed constant over time. Lives in a young, artsy neighborhood of a major city such as Wicker Park in Chicago, Greenwich Village in Manhattan, or Williamsburg in Brooklyn. Usually has some degree of monetary conformability, although sometimes only because of their parents, due to cost of living in these areas. Works (or wants to work) in music, art, or fashion. Has "elitist" music taste and listens to nu-rave (i.e. The Klaxons, Cut Copy, Hercules and Love Affair), minimalist techno, independent rap (i.e. Spank Rock, Talib Kweli, Aesop Rock), nerdcore (i.e. YT Cracker, MC Lars, MC Chris), Elephant 6 (i.e. of Montreal, Neutral Milk Hotel, Apples in Stereo), garage rock, and punk rock in addition to all manners of independent rock. Favorite band is very likely Bright Eyes, The Arcade Fire, The Arctic Monkeys, The Libertines, The Strokes, or something of that nature. Also watches independent and foreign films and reads independent books, magazines, and periodicals. I...

Referring to young people of around 18-30 years of age, who drink cheap beer (most often Pabst Blue Ribbon, on occasion Budwiser), smoke Parliaments, Lucky Strikes or hard to obtain foreign cigarettes (such as Gauloises) and take recreational drugs, coke being the most popular. Use a great deal of sarcasm, claim to be ironic. Are usually less than 5% body fat, drink copious amounts of coffee and eat children's cereal. Listen to Indie Rock, rely heavily on Pitchfork Media to tell them what's cool. Don't dance at concerts. Wear a mixture of thrifted clothing and items bought at American Apparel (commonly Tri-blend v-necks) and Urban Outfitters. Extremely tight jeans worn by both sexes, pairing these with either a band or b-movie t shirt and a plaid shirt/v-neck and a cardigan along with Nike hi-tops/Vans/Keds. Females often wear retro style dresses and racerback tank tops without bras. Eschew public transport and instead choose to ride fixed-break bikes. Often claim to know about literature and film - will have googled a good deal of Vonnegut and French New Wave cinema.

Someone who listens to bands you've never heard of, wears ironic tee-shirts, and believes they are better than you.

A hipster is someone who is smart enough to talk about philosophy, music, politics, art, etc. with you all day long, but not smart enough to see how big of a tool s/he is. The only sure fire way to tell if someone you're talking to is, in fact, a hipster is to ask them "are you a hipster?". If they respond no, and turn their casette player back on, you can be sure you're dealing with a hipster.

\hip-stur\n. One who possesses tastes, social attitudes, and opinions deemed cool by the cool. (Note: it is no longer recommended that one use the term "cool"; a Hipster would instead say "deck.") The Hipster walks among the masses in daily life but is not a part of them and shuns or reduces to kitsch anything held dear by the mainstream. A Hipster ideally possesses no more than 2% body fat.

-The Hipster Handbook, Robert Lanham